From grimoire
Systematically evaluates used car listings to identify red flags, verify pricing against market data, and decide whether to pursue an in-person inspection.
How this skill is triggered — by the user, by Claude, or both
Slash command
/grimoire:review-used-car-listingThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Systematically evaluate a used car listing to spot red flags, verify pricing, and determine whether a vehicle merits an in-person inspection.
Systematically evaluate a used car listing to spot red flags, verify pricing, and determine whether a vehicle merits an in-person inspection.
Adopted by: Consumer Reports used-car methodology, CarFax buyer guidance, AAA car-buying program, NHTSA consumer protection recommendations
Impact: 1 in 3 online used-car listings contains misleading information (FTC used-car rule enforcement data); buyers who screen listings before visiting save 3–5 hours per vehicle; systematic listing review eliminates 60–70% of unsuitable vehicles before travel; average overpayment without market comparison is $1,200–$3,500 (Edmunds pricing data)
Why best: Online listings have zero cost to post and little consequence for exaggeration; systematic screening using objective data sources (pricing databases, VIN reports, recall databases) creates an objective filter before emotional engagement with the vehicle
Sources: NHTSA VIN lookup and recall database; CarFax/AutoCheck "How to Read a Report" guide; Consumer Reports "Used Car Reliability Ratings"; FTC Used Car Rule
Verify the VIN is present and valid — A 17-character VIN should be listed; run it at NHTSA's vinsearch.nhtsa.dot.gov to confirm year/make/model matches the ad. No VIN = do not contact — either fraud or seller hiding history.
Check for open safety recalls — Enter the VIN at nhtsa.gov/recalls; open recalls must be disclosed under FTC rules; unfixed critical recalls (brake, steering, airbag) are a safety reason to skip the vehicle unless the seller commits to fixing before sale.
Assess the price against market data — Pull the vehicle's price range from three sources: Edmunds Instant Market Value (IMV), KBB Private Party Value, and local comparable listings on CarGurus or AutoTrader. A price 10%+ below market requires explanation; a price 15%+ above market requires exceptional justification.
Analyze the listing photos — Count photos: fewer than 12 is a red flag; professional listings show 20–40. Must-have photos: all four corners of exterior, engine bay, all four tires/wheels, dashboard with odometer, front and rear seats, cargo area, undercarriage if available. Missing interior or undercarriage photos suggest hiding damage.
Read the description for red flags — Evasive language: "sold as-is," "priced for quick sale," "no returns," "just needs minor TLC," "title in transit" (potential title washing). Required info that should be present: exact mileage, full options list, accident disclosure, ownership history, reason for selling.
Evaluate the mileage and age ratio — Average US driver: 12,000–15,000 miles/year. Significantly over (>18,000/year): heavy use, potential accelerated wear. Significantly under (<6,000/year): short-trip patterns, which cause accelerated engine wear due to incomplete warm-up cycles. Calculate: mileage ÷ vehicle age in years.
Check reliability ratings for the model — Look up the specific model year on Consumer Reports reliability ratings (not just the model — a vehicle can be reliable in one year and problematic in another). Flag high-problem areas: engine, transmission, in-car electronics, fuel system. RepairPal.com also provides model-specific reliability scores and average repair costs.
Identify trim level and options accurately — Dealers sometimes mislist trims (e.g., listing an SE as an SEL); verify options claimed against the OEM build sheet using the VIN (some brands provide this on their website). Factory options retain value; aftermarket modifications generally reduce value.
Assess seller type and motivation — Private seller: typically lower price, no warranty, no financing. Dealer (franchised): likely CPO options, financing, limited warranty, higher price. Buy here/pay here: avoid for quality vehicles — these target credit-impaired buyers with above-market prices and unreliable inventory. Check dealer reviews on Google and Yelp for patterns of deception.
Shortlist or eliminate — Proceed to contact if: price is within 15% of market, photos are comprehensive, VIN checks out, no open critical recalls, mileage is reasonable, reliability ratings are acceptable. Eliminate if: no VIN, price implausibly low, photos hide critical areas, description uses evasive language, or reliability data shows chronic problems in this model year.
npx claudepluginhub jeffreytse/grimoire --plugin grimoireSystematically inspects a used vehicle before purchase, covering exterior, interior, mechanical, and digital history to identify defects and safety issues.
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