About BullionBidder
New to bidding or a seasoned stacker, BullionBidder shows you what a lot will really cost and whether it's a good buy, before you bid.
Why this exists
Auction catalogs are full of noise, whether PDF or spreadsheet. Every one hides real value. Lots under retail. Lots near spot. Sometimes lots below spot. The count varies. But finding them all by hand is hours of math, often a whole evening per catalog. That is how the deals slip past most bidders. It is also how emotion takes over once the clock starts. BullionBidder does the math across the catalog in seconds. It color-grades the lots. It shows you which ones are worth a bid, and at what price. So you bid smartly instead of chasing the room.
What we believe
Stackers shouldn't pay full retail
Bullion is one of the few markets with real gaps left. Good lots slip by while the room chases the headline pieces. We help you catch them.
Your data, your control
We keep only the catalog data you choose to save, plus your tracked bids. You can see it and delete it whenever you want, and closing your account erases all of it. We never sell it and never share it.
Free should mean free
The full analyzer is free, with no paywall on the basics. We built it for ourselves first, and paid plans only raise your monthly credits for heavier use. That is what keeps the lights on, not locking up features.
Honest accuracy
We would rather say "needs review" than show you a confident wrong number. Every lot is yours to override, and your correction always wins. The tool is a starting point for your own eye, never the last word.
Fast, accurate, and private by design
The engine works in a few layers. It starts from a bullion-spec database we built coin by coin, then reads the weights stated in each listing. Harder lots get a closer look. Live spot prices, exchange rates, and active marketplace listings all update in real time. Your file is read in your browser and never uploaded.
Get in touch
BullionBidder is actively maintained. It improves based on user feedback. New features, mint patterns, retail premiums, and reading improvements ship regularly. Write to info@bullionbidder.com or use the contact form for any of these: feedback, bug reports, feature requests, partnership inquiries, or privacy and data-rights matters. We read every message.
Open the contact form