Live private-market comps + AI diagnostics

Know the car.
Know the value.

One VIN. Live private-market pricing, AI-guided diagnostics, open recalls, and failure risk — in one platform. Built for dealers, shops, and buyers who need the truth.

No VIN? Enter Year / Make / Model →

Live Marketplace comps
AI diagnostic walkthroughs
Every open recall surfaced
Failure risk by mileage

The tools that exist
weren't built for you.

Every tool in the market serves one segment with one type of data. Nobody combined them until now.

Dealer

You're appraising from yesterday's prices.

KBB, Black Book, and MMR use dealer transactions and auction data. By the time it updates, you've already overpaid on three trade-ins.

KBB — lags real market by weeks
Black Book — wholesale only
MMR — auction data, not street price
vAuto — $1,000+/mo, franchise-primary
Repair Shop

You're paying $229/month for a library, not a diagnosis.

Identifix and AllData are reference databases. You look up a code and get a document. Nobody walks your tech through the right sequence of tests.

Identifix — $229/mo, no guided logic
AllData — OEM docs, no AI reasoning
ProDemand — lookup tool, not walkthrough
Comebacks at 10-15% still the norm
Buyer

You're negotiating blind with someone who does this every day.

FIXD reads your codes. CarMD gives you cost estimates. Neither tells you what the car is actually worth in your market right now, or what's likely wrong with it at 94K miles.

FIXD — code reader, not diagnostic logic
KBB — asking price, not selling price
Carfax — history only, no live market
No tool combines both

One VIN. Everything attached to it.

Decode the VIN once. Both modules — valuation and diagnostics — run from the same vehicle identity. No re-entering data. No switching tools.

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STEP 01

Enter the VIN

Scan or type the VIN. The vehicle is decoded instantly — year, make, model, trim, engine, known configs, open recalls. Everything runs from this identity.

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STEP 02

See the full picture

Live comps from private marketplace listings. Probability-weighted failure risks by mileage. Every open recall. Condition-adjusted acquisition target. All from one input.

STEP 03

Make your move

Print the offer with documented justification. Start a guided diagnostic and pick up exactly where you left off. Every session, every finding, every outcome saved to that VIN forever.

What the car is
actually selling for.
Right now.

We pull active listings from Facebook Marketplace, eBay Motors, Cars.com, and OfferUp — not last month's auction averages. Updated every four hours. You see what private sellers are asking in your market today, not what a dealer paid at auction six weeks ago.

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Hyper-local comps Private party listings within your radius, refreshed every four hours. See what the same truck is asking for 40 miles away right now.
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Private market vs. retail spread See the gap between private party asking prices and dealer retail listings. Know exactly what margin the market will support before you make an offer.
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Acquisition targets Walk into every trade-in and auction buy knowing the floor price to hit your margin. Adjusted automatically when you add condition issues.
gauge.app — Valuation Report
1C4HJXEG2JW123456
2018 Jeep Wrangler JL Unlimited Sport S
3.6L V6 · 4WD · 94,200 miles · Granite Crystal
$23,400
3 comps
$21,800
15% margin
$28,100
+$4,700 over market
Live comps — 150mi radius · updated 4 hours ago
Facebook Marketplace · Nashville, TN
2018 JL · 91K mi · no accidents
$24,500
Facebook Marketplace · Murfreesboro, TN
2018 JL · 98K mi · minor scratch
$23,400
eBay Motors · Active listing
2018 JL · 88K mi · Sport S
$22,900
Cars.com · Franklin, TN
2018 JL · 102K mi · dealer listing
$26,988
⚠️ 3 open recalls on this VIN — 1 unaddressed (Brake Booster). NHTSA verified.

What you see on the lot adjusts the offer automatically.

Note what you observe during the walkaround. Enter any codes from a quick scan. The platform estimates repair costs for each issue, subtracts them from market value, and hands you a documented acquisition target you can show the seller.

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Input what you notice CEL codes, noises, rough idle, tire wear, windshield cracks, body damage. Anything that affects the number.
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Repair cost ranges by YMMT + mileage P0420 on a 2018 JL at 94K miles means something different than on a 2024 F-150. Costs are weighted by vehicle, mileage, and regional labor rates.
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Printable offer justification Hand the seller a document showing exactly why your number is your number. Kills the argument before it starts.
gauge.app — Condition Assessment
1C4HJXEG2JW123456
2018 Jeep Wrangler JL · 94,200 mi
Private market range: $23,400 — $24,500
Observed conditions
P0420 Check engine light — catalyst efficiency
$450 — $950
O2 sensor likely · cat possible
NOISE Front end grinding — speed dependent
$280 — $720
Wheel bearing 67% · rotor 22%
GLASS Windshield crack — lower driver corner
$280 — $420
OEM replacement · no ADAS recal needed
TIRES All four worn below 3/32 — replace set
$680 — $960
BFG KO2 265/70R17 · installed
Market value range $23,400 — $24,500
Estimated repair exposure — $1,690 — $3,050
Adjusted acquisition target $20,350 — $21,710
15% margin applied · Nashville market · April 2026
2018 Jeep Wrangler JLSession #2 · Started 14 min ago
Battery 12.5V at terminal Enters RUN mode Brake lights functional Ground path instability (fixed)
BCM authorization failure Main battery voltage failure ESS as primary cause
K3 relay physical presence TIPM fuse configuration
→ Next step
Open the TIPM fuse box. Locate slot 5. Verify the K3 starter solenoid relay is physically present. This is the highest-probability unverified item given current confirmed state.
Ranked hypotheses
Missing K3 starter relay
78%
TIPM misconfiguration
14%
Starter circuit open
8%

A checklist that
thinks. Not another
code reader.

Structured intake. Ranked hypotheses. A live state board that tracks everything confirmed, everything ruled out, and the single best next test to run. The discipline of a master tech, built into every session.

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Sequence discipline The system won't let you chase a module failure until it knows the relay is in the socket. Stops the $900 misdiagnosis before it starts.
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YouTube-linked repair videos Every test step links directly to the repair video for your exact year, make, and model. No searching. No guessing which video applies.
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Parts with affiliate pricing Confirmed root cause? Parts appear instantly with RockAuto, Amazon, and NAPA pricing. No leaving the session.
Isolation tests built in "Pull the vacuum line. Observe result." Force-known-state shortcuts that short-circuit 3 hours of guessing in 30 seconds.
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Picks up where you left off Every confirmed finding, every ruled-out path, every next step — saved to the VIN automatically. Close the browser, hand it to another tech, bring the car back in three weeks. The board is exactly where you left it.
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Comeback tracking Every completed session logs the diagnosis, the fix, and whether the vehicle returned within 30, 60, or 90 days. Industry average comeback rate is 10–15%. See yours. Drive it down.

Two real cases. Two
mechanics who missed it.

Before this product had a name, it was a diagnostic method. These cases built it.

Case 01 · 2015 Ford F-150 Platinum · 149K miles

The smell wasn't the belt.
The noise wasn't the axle.

Front-end vibration between 20-40 MPH in 2WD. Burning rubber smell. Cold start growl. Three mechanics guessed. One AI-guided session found two separate overlapping failures — belt tensioner damping and IWE hub partial engagement from a vacuum leak — neither of which required expensive parts.

$1,400+
$140
1
Key finding: Forcing the system into a known state (pulling the vacuum line) confirmed the failure bracket in under 2 minutes. No scanner needed.
Case 02 · 2018 Jeep Wrangler JL · 3.6L

$900 replacement part.
Original TIPM needed a $15 relay.

Complete electrical death. Relay chatter. Heater and wipers on their own. A $900 reman TIPM was bought and installed before anyone verified the original unit's relay population. The reman was defective too. When the original TIPM went back in, the K3 starter relay was physically missing. $15 part. Never needed a new TIPM at all.

$900
$15
7
Key finding: Seven CAN bus codes were noise from one power event — not seven separate failures. Clustered correctly, the diagnostic tree collapsed to a single test.

Private market comps
are just the start.

Some tools now pull private party listings. None of them take those comps, run a walkaround condition assessment, and hand you a documented acquisition target adjusted for repair exposure — in one step.

Every other tool

Auction and dealer transaction data. Updated weekly or monthly. Built for what the industry knew, not what buyers are doing today.

KBB Private Party Value Weeks old
Manheim Market Report (MMR) Auction only
Black Book Weekly update
NADA Guides Monthly update

GAUGE

Live private-market listings from where buyers and sellers actually transact. Real prices. Real people. Updated in hours, not weeks.

Facebook Marketplace comps Live
eBay Motors active listings Live
Cars.com + OfferUp listings Live
NHTSA recalls + complaints Real-time
JeepForum, F150Forum, GM-Trucks (diagnostic) Indexed
YouTube repair transcripts (ChrisFix, South Main Auto) Indexed

One report. Both modules.
Everything you need to decide.

The pre-purchase inspection report combines live market comps, condition-adjusted acquisition target, failure probability by mileage, and every open recall — in one printable page. For a buyer evaluating a listing. For a dealer making a trade-in offer. For a shop quoting a repair.

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Live comps
What the same vehicle is asking for in your market right now. Not last month's auction.
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Failure risk by mileage
At 94K miles, a JL has a 34% IWE failure probability. Built into every report, automatically.
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Condition-adjusted target
Market range minus repair exposure minus your margin. The number to offer, not to guess at.
⚠️
Open recalls
Every unaddressed NHTSA recall surfaced on the report. The ones that kill trade-in value after you've already bought it.
$29
One-time pre-purchase report
No subscription. Full valuation + diagnostic risk in one PDF.

Simple tiers. No contracts.
Cancel any time.

Start with a 30-day free pilot. Pay only when you see the ROI.

Consumer
$14/mo
For DIY owners and used car buyers.
  • Unlimited VIN lookups
  • Live market valuation
  • AI diagnostic walkthroughs
  • YouTube repair links
  • Parts pricing with affiliate links
  • NHTSA recall check
Repair Shop
$149/mo
Per bay. For independent shops replacing Identifix.
  • Everything in Consumer
  • Multi-tech accounts
  • Diagnostic session history per VIN
  • Comeback tracking
  • Repair order documentation export
  • Shop repair pattern learning (coming soon)
Enterprise
Custom
For dealer groups, multi-location chains, fleet operators.
  • Everything in Dealer
  • Unlimited rooftops
  • White-label option
  • Custom data integrations
  • Dedicated onboarding
  • SLA + priority support

One-time pre-purchase report: $29 — no subscription required.

One call. One pilot.
Know if it works in 30 days.

We offer a free 30-day pilot for dealers and shops. No contract. If the tool doesn't help you buy one car smarter or cut one comeback in the first month, cancel with one email.