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Selling fees stack up
On a $500 sale, modeled eBay-style fees can run about $66.55. That’s money that never hits your drawer.
Stop paying marketplace tax on every coin you sell.
CDX is a timed auction marketplace for coins and bullion, built for SpotPro dealers, with SpotPro Software. SpotPro dealers list and sell free — always. Collectors bid free. No buyer premium. Buyers pay you — not a giant platform holding your money.
$0CDX sell fee · SpotPro shops — always $0
0%Buyer premium on the sold price
~$67Typical eBay model take on a $500 sale
Metal toolsValue scores on every bullion card
Other platforms were not built for coin shops.
They were built for sneakers, comics, kitchen gadgets — or for a live stream that takes a cut of every “sold!”
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Paid boosts to be seen
Other sites charge a percentage to promote listings. On CDX, strong value can rank in Great deals without a paid boost.
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No metal-value brain
Generic marketplaces don’t show live metal value, “below metal value,” or guide chips. Dealers and buyers do that math in their heads — or guess wrong.
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Live-show tax
Show platforms often tax the night. CDX is timed auctions with an optional live floor / TV view — without a show commission product.
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Buyer premiums at majors
Major houses often add 10–25% on top of the sold price for buyers. CDX: you bid what you pay for the lot (plus shipping you agree with the seller).
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Separate listing brain from SpotPro Software
Double-entry kills shops. CDX lists from SpotPro Software and can hold stock after a serious bid so the counter doesn’t sell it twice. The same POS stock powers ExtraCoins retail and Coin Dealer X wholesale — live shows and active bids can surface “get your bid in” notices on the shop’s ExtraCoins product page so web buy-now doesn’t double-sell.
On a $500 sale, who keeps the money?
Illustrative models for education — your categories and promos may differ. Card fees on your processor still apply when buyers pay you.
eBay-style model
−$66.55
You keep ~$433.45
Whatnot-style model
−$59.50
You keep ~$440.50
CDX · SpotPro sellers
$0.00
You keep $500.00 (no CDX cut)
Open live fee calculator Seller pricing plans vs Amazon coin fees
For collectors: bid smarter, not louder.
Free accounts. Real value signals before you open the lot. Pay the dealer when you win.
Great deals scores
Lots scored great / fair / premium vs metal value, wholesale guides, and retail averages — not seller marketing copy.
Below metal value filter
Find bullion priced under raw metal when it happens. Rare on big marketplaces; easy here.
Max bid
Set the most you’ll pay. We only bid enough to keep you ahead. Optional: max as a % of metal value.
Set checklist
Mark dates you own. See missing dates. Chase live lots that fill holes in Morgan, Lincoln, ASE, and more.
Make offer
Private best offers when the seller allows it. Accept / counter / decline — no public bidding theater.
No buyer premium
What you bid is what you pay for the lot. Shipping and payment methods are between you and the dealer.
For dealers: list from SpotPro Software. Keep the margin.
SpotPro shops always list and sell at $0 CDX fees. Your SpotPro inventory stays the source of truth.
List from SpotPro Software or CDX sell
Inventory → auction, or cdxauction.com/sell.php with photos, metal tools, and description writer. CSV import from eBay exports.
Buyers pay you
Card, PayPal, Zelle, wire — from Company Profile. CDX is not holding coin proceeds in a marketplace wallet.
Feature lots free
Boost visibility without a “promoted listings” cut of the sale. Second-chance offers on unsold lots. Watchers + views on every lot.
Move off eBay without the headache
Import CSV, bulk reprice to metal value, end-list checklist, “also on eBay” flags, fees-avoided meter. Move from eBay guide.
Full product tour — what you actually get
Plain English. Same features live on the site today.
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Great deals
Automatic value scoring on live lots. Filter to great/fair. Free prominence for strong value.
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Ending soon
Lots about to close, popular endings first, and timer extensions so last-second bids don’t end the sale cold.
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Live floor view
Full-focus next lot for a shop TV or host — timed auctions, not live show commission night.
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Modern mint & sealed
Current-year ASE, proof sets, sealed product — metal tools and $0 sell vs Amazon-style referral cuts.
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Sets & missing dates
Year/mint maps. Mark owned. Chase list. Fill holes without keyword homework.
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Buyer ↔ seller messages
Private mail about lots, pickup, and shipping — separate from system alerts.
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Alerts that matter
In-app bell + email: outbid, ending soon, wins, offers, saved searches (including below metal value).
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Lots with video
Product video on the lot page and Prime lane — show the coin spinning, not a stock thumbnail only.
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Guide price chips
Saved wholesale/guide dollars when the shop linked pricing — not looked up live every time you open a page.
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Full descriptions
Formatted text on sell + store about/policies. Generate a draft from SpotPro, then edit freely.
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Dealer storefronts
Public store page, feedback, about, policies, live / fixed / sold tabs.
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Trust checks
Email verify, progressive friction, optional phone/ID for sellers, payment risk signals — without locking out good buyers.
Side by side — no fluff
Feature comparison vs common alternatives. Fees are illustrative models.
| What you care about | CDX Auction | eBay-style | Live-show apps | Major houses |
|---|---|---|---|---|
| Seller fee to the site | $0 for SpotPro sellers · public plans capped | ~13% + fees model | ~12% all-in model | Seller schedule + buyer premium world |
| Buyer premium | None (0%) | — | Built into show economics | Often 10–25% |
| Metal value on cards | Yes + great/fair scores | No | Host judgment | Catalog essay, not live metal |
| Max bid as % of metal | Yes | No | No | No |
| Who gets paid | Buyer pays the dealer | Managed payments | Site pays out later | House settles |
| Inventory hold in SpotPro Software | After first bid | Separate listing system | Show inventory | Consignment warehouse |
| Feature lots free | Yes | Paid promote % of sale | Boost show time | Catalog placement |
| Set checklist tools | Yes | Search homework | Hope it shows up | Want list offline |
How it works in three steps
Whether you buy or sell, the loop is simple.
Register free
Confirm your email. Buyers can bid and make offers. Sellers use the same email as SpotPro to unlock listing.
Bid or list
Collectors set a max or Buy Now. Shops list from SpotPro or the sell form with photos, metal tools, and full descriptions.
Settle with the dealer
When you win, you pay the selling shop (card, PayPal, Zelle, wire). They ship with tracking or offer local pickup.
“Coin-native auctions shouldn’t feel like selling toaster ovens on a general marketplace — or yelling over shipping mid-stream on a show app.”
— Why we built CDX for SpotPro dealers
Ready when you are.
Browse live lots free. One free account to buy and sell. SpotPro software shops list at $0 CDX fees. Questions? Read the docs or email support.
Competitor fees are illustrative models for education, not a guarantee of any third party’s current rates. SpotPro shops: list and sell fees are always $0. Public (non-SpotPro) seller rates are on pricing. Legal: Terms · Privacy.