BullionBidder
How it works
From a raw auction catalog to a ranked list of deals in under a minute. Here's the whole flow.
Drop in a catalog
Drag in the PDF, Excel sheet, or CSV, or paste the lot list straight from an email or website. It reads in seconds, right in your browser.
Set your fees and terms
Every lot's all-in cost is only as right as your fees. Set the buyer's premium for this house once and it applies to every lot (add a second rate if some lots charge differently), choose per-lot or one combined shipping cost and enter the amount, and pick how close to dealer retail you want your maximum bid. If your lots are taxable, add your sales tax rate and choose whether it covers shipping, and it lands only on taxable lots, with investment bullion left exempt. Two more toggles: keep your AI results cached for 30 days so re-opening a catalog is free, and turn the AI reader on or off (on catches lots the basic reader misses, the price is the same either way). Edit any of it any time, and every lot updates instantly.
Set the two currencies
Two separate settings, easy to mix up. Get them right when you load a catalog and every number reads correctly.
a) Catalog currency = the auction house's currency
b) Your currency = the spot-price bar
See the wins at a glance
The summary cards show how many lots are under spot, how many under dealer retail, and what you'd save winning them all. The deepest discounts surface as Top Opportunities.
See every lot, with its grade
Every lot is graded from STEAL down to PASS, with its all-in cost right beside melt and retail. Search, filter, sort. Override anything the app read wrong.
See where to buy and what it's selling for
Spot a lot you like? Click the magnifier next to it. We pull live prices from bullion dealers and recent listings from eBay US and Canada, right there in the results. Melt and dealer retail tell you the metal value. The dealer prices and eBay listings show what the same piece costs to buy right now, which matters for graded coins and collectibles that trade above melt.
The little buttons on each lot
- Pencil: edit what the app read, the metal, weight, or purity, if it got it wrong.
- Bookmark: track your bid on this lot and whether you won, to look back on later.
- Magnifier: see where to buy it, comparing dealer prices and eBay listings for similar pieces.
Click the magnifier and the where-to-buy comparison opens right there.
No catalog? Quick Check is our free price calculator
Quick Check is a free all-in-one price calculator for any single gold, silver, platinum, or palladium coin, bar, or junk silver, no upload. Type the details or paste a description and see how it compares to live spot and dealer retail. Buying at auction? Add the buyer's premium, shipping, and any sales tax (all optional) for your true all-in cost. Works on a dealer's price, a private sale, or something you already own.
What's It Worth? is our free calculator for selling your metal
The free calculator for the selling side. Describe the item or pick it from the list, and see what a coin shop, an online buyer, and a pawn shop would each pay you, as a share of melt beside the melt value and retail.
Pro and Pro Plus
Build a bid sheet to take to the auction
Pro and Pro Plus can select lots and save or print a clean bid sheet. Do your work in the table, tick the lots you care about, and print one page with your max bid on each, on paper or as a PDF on your phone.
1. Tick the lots in the table
Fill in your maximum bids, check the boxes of the lots you want, across any grade or category, then click Save/Print bid sheet.
2. Save or print your sheet
Your picks open as a clean sheet with the max bid for each, ready to print or save as a PDF for the room.
Keep a library of all your catalogs
Pro and Pro Plus keep every catalog you save, not just your latest one, so you can reopen any auction and pick up where you left off. Everyone can rename a saved catalog, so your library stays easy to scan.
My Vault: your whole stack, at live metal prices
Everything you own in one place, valued at live metal prices that refresh while you are looking at them. Start typing a coin or bar and it fills in the weight and purity for you, or add anything of your own.
See what it is worth today
The top of the page answers three questions in order: what your metal is worth right now, what you paid for it, and how far those two have moved apart. Melt and retail stay separate, because melt is a fact and retail is an estimate of what a dealer would ask.
Your whole stack, piece by piece
Every holding is a row: metal, weight, purity, count, mint, year, what you paid and what it is worth now. Sort any column, filter on almost any field, search by name. Edit anything whenever you like, and delete anything you no longer want. The magnifying glass on any row looks up what the same piece is selling for.
Add anything, in as much detail as you like
Metal, weight, purity and how many is all it needs. Everything else is optional, so fill in what you know and come back to the rest whenever you feel like it.
What the metal did, and what you paid over it
Two figures that answer different questions, kept apart on purpose. The chart prices everything you hold today at each day's close, over whatever window you pick. Underneath it, what you actually paid against what the metal was worth on the days you bought, so the premium you paid never gets mixed up with what the price has done since.
Your cost per ounce, and where you bought
Your average cost per ounce as it built up, one panel per metal, stepping only on the days you bought. Underneath, what each place you buy from charged over the metal on the day you bought, which is the only fair way to compare two shops you used years apart. It is closed by default, because it answers a question you ask a few times a year.
When something goes
Mark it sold and it moves to its own list with what you paid, what you got, the difference, and what the metal was worth that day, so you can see how far over spot you actually sold. Nothing is deleted, the charts show what came in month by month, and un-selling is one click if you change your mind.
What the vault does
Getting it in
- Import your spreadsheet. The app reads your column headings, whatever you called them, and shows you what it found before anything is saved.
- Add anything yourself. Only the metal, weight, purity and how many are required. Fill in as much of the rest as you want.
- From your bid journal. Won a lot? One click sends it over, with nothing to retype. Nothing moves unless you ask.
What it tells you
- Today's value. Melt and a retail estimate side by side, never blended into one number.
- What it sells for. The magnifying glass on any row pulls dealer prices and live eBay listings for the same piece. It searches on what the item is, never on your notes or what you paid.
- Thirty-three currencies. See the whole page in the one you think in. Purchases keep the currency you actually paid in.
- Not everything was bought. Mark it as a gift or an inheritance and skip the price fields altogether.
When you sell
- Mark it sold. It moves to its own list with what you paid, what you got and the difference.
- See where it came from. Charts for what came in month by month, and which metal it came from.
It stays yours
- Find anything. Search, sort and filter on metal, mint, year, form, condition, where you bought it, date and price.
- Export any time. CSV of your whole vault, never just what is on screen.
- Print it for your insurer. An insurance schedule of everything you hold, with weight, purity, serial numbers, what you paid and what it is worth today, at the metal prices it names and dated. Save it as a PDF. It is not an appraisal, and it says so.
- Delete any of it. Permanently, whenever you want, several at once.
- Kept secure. Encrypted in transit and at rest, backups included. Read how we protect your data
The free plan holds 15 holdings in your vault. Stacker holds 75, Pro holds 200, and Pro Plus is unlimited. Moving to a smaller plan never deletes anything, and that covers every step down, not just a fall to free: your whole vault stays readable, editable and exportable, and the only thing that stops is adding more until you are back under the new limit.
Ready to run the numbers on a real catalog?
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