About
What Is PreHammer?
UK vehicle-appraisal Chrome extension with live comps, MOT history and a maximum bid calculated locally from your own costs and target margin.
Who it is for
- UK car flippers analysing AutoTrader, eBay and Gumtree listings.
- Independent traders at BCA, Manheim, Copart and forecourt buying days.
- Buyers who need margin maths and red flags before bidding or messaging.
Key features
- PreHammer analyses AutoTrader, eBay and Gumtree listings in one click.
- PreHammer returns BUY, PASS or DEPENDS verdict before you bid.
- PreHammer gives one instant appraisal and four more after email confirmation.
- PreHammer pulls live UK retail comps when you scan a listing.
- PreHammer flags MOT mileage clocking against listing claims.
- PreHammer Starter costs £9.99 per month for 200 appraisals.
- PreHammer works on BCA, Manheim, Copart and forecourt listings.
- PreHammer calculates maximum bid from dealer-set fees, costs and target margin.
Pricing
Free: 5 full appraisals, no card. Paid plans from £9.99/mo.
Category: Automotive · Chrome extension · Finance
Frequently asked questions
- What is PreHammer?
- PreHammer is a Chrome extension that appraises UK vehicle listings with live comps, MOT evidence and a maximum bid calculated from your own costs.
- Is PreHammer free?
- Yes to start. Run the first full appraisal without signup, then confirm your email for four more. No card is required.
- PreHammer AutoTrader — does it work?
- Yes. Open any AutoTrader listing in Chrome and click PreHammer for comps, MOT checks and margin maths.
- PreHammer car flipping — how does it help?
- PreHammer shows sourced retail comps and applies your saved buyer fee, prep, transport, selling costs and minimum margin before you bid.
- How does PreHammer work?
- Install the Chrome extension, save your deal assumptions locally, open a listing and click PreHammer. Market and vehicle evidence return from the server; your money and verdict are calculated in Chrome.
- PreHammer vs manual research — why use it?
- PreHammer pulls comps and MOT evidence in one click, then applies your saved deal costs. Manual checks across tabs take 10–20 minutes per car.
- What are PreHammer Pro features?
- Paid tiers add more monthly appraisals and comp lookups. Trader includes 500 appraisals and 2,000 comp lookups per month.
- PreHammer eBay and Gumtree — supported?
- Yes. PreHammer works on eBay Motors, Gumtree car ads, Facebook Marketplace and UK auction catalogues.
- PreHammer price — how much does it cost?
- 5 appraisals free. Starter is £9.99 per month. Trader is £19.99 per month. Annual billing saves roughly two months.
- PreHammer Chrome extension — how to install?
- Install from the Chrome Web Store and open a supported listing. The first appraisal needs no key or signup; subscribers paste their key once after checkout.