Know the Real Price Before You Bid
Free Chrome extension that shows price history, total costs, and Amazon comparisons on every mac.bid auction lot.
Works with Chrome and Chromium-based browsers (Edge, Brave, Arc)
Why Bidders Use mac.bid Overlay
Instant Price Context
High, low, average, and median prices appear automatically on every lot. A visual histogram shows the full price distribution at a glance.
True Cost Calculator
See the real price after buyer's premium, lot fees, and tax. Enter your budget and instantly see your maximum bid.
One-Click Research
Compare prices on Amazon, eBay, and CamelCamelCamel without leaving mac.bid. Jump straight to the right search results.
Smart Bid Planning
Reverse-calculate from your total budget to the exact bid amount. A step-by-step bid table shows total cost at every increment.
How It Works
Install from Chrome Web Store
Browse mac.bid lots as usual
See price data automatically
No configuration needed. The overlay appears on every lot page the moment you install.
Ready to bid smarter?
No account required. No data collected. Just better bidding.
Extension coming soon to the Chrome Web Store.