Classical Numismatic Group
Classical Numismatic Group (CNG) is a coin auction house focused on ancient Greek, Roman and Byzantine coins, plus medieval and British coins. This page covers what it sells, how its different sale types work, and the buyer's fee for each, with a direct link to cngcoins.com.
- First sale
- 1987
- Based in
- Lancaster, Pennsylvania
- Buyer's fee
- 20% to 25% by sale
- Card fee
- 2.5%
Go to Classical Numismatic Group →How buying worksFees
About Classical Numismatic Group
CNG held its first auction in 1987. It has offices in Lancaster, Pennsylvania, and London, with a further office in The Hague. It is one of the main U.S. houses for ancient coins. Its Triton sale each January in New York is one of the larger ancient coin auctions of the year.
CNG runs several kinds of sales. Triton is a printed public auction held in January alongside the New York International Numismatic Convention. Feature auctions are printed catalog sales that close online. Electronic auctions run online for about two weeks and close on Wednesdays, and there are also Keystone and numismatic literature sales. Bidding runs on auctions.cngcoins.com and partner platforms.
What Classical Numismatic Group sells
How buying works at Classical Numismatic Group
- Make an accountRegister on auctions.cngcoins.com. Staff must authorize you before you can bid.
- Get approvedBidders new to CNG give credit references or pay a deposit set by CNG.
- BidBid online, on the floor at Triton, or by written, email or phone bid. Written and phone bids carry a higher fee.
- Add the costsAdd the fee for that sale type, postage, insurance and handling, any state tax or VAT, and 2.5% if paying by card.
- Pay and receiveInvoices are due on receipt. Lots ship after payment, and title passes only when paid in full.
What it costs
These are the buyer charges in CNG's conditions of sale (last updated 2022 and still posted in 2026).
| What | Cost |
|---|---|
| Triton and Feature sales, floor or online bids | 22.5% of the hammer price |
| Triton and Feature sales, written, email, fax or phone bids | 25% of the hammer price |
| Electronic auctions | 20% of the hammer price |
| Keystone auctions | 22.5% of the hammer price |
| Literature sales | 22.5% of the hammer price |
| Minimum buyer's fee | None stated |
| Credit card payments | 2.5% handling fee; cards not accepted more than 14 days after the sale |
| International wire | $20 for bidders outside North America and the UK |
| Late fee, Electronic, Keystone and literature sales | 2% or $25, whichever is more, after 14 days |
| Interest | 2% a month on invoices unpaid after 30 days |
| Shipping | Postage, insurance and handling added to the invoice |
| U.S. sales tax | Charged in CA, MD, NJ, NY and PA; coins exempt in PA, in CA on invoices of $1,500 or more, and in MD over $1,000; books and antiquities taxed |
| UK and EU buyers | Import VAT may be added |
Worked example: a coin won for $1,000 in an Electronic auction costs $1,200. In a Feature sale with an online bid it costs $1,225, or $1,250 with a mailed bid. Card payment adds 2.5%, before postage and any tax.
Paying, pickup and storage
| When to pay | Invoices are due on receipt. Cards are not taken more than 14 days after the sale. |
| Payment | Check, wire or credit card. Card payments add 2.5%. |
| Default | After 30 days CNG may resell the lot and charge the buyer the shortfall and costs. |
| Shipping | U.S. insured or registered mail unless the buyer asks otherwise. |
| New bidders | Credit references or a deposit set by CNG for Triton and Feature sales; staff approval for online sales. |
| Sales tax | Waived only with a valid resale certificate. |
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UX Search is independent and is not affiliated with or endorsed by Classical Numismatic Group. Bidding, payment and delivery all happen on the house's own site under its own terms. Information checked October 22, 2026 from auctions.cngcoins.com (conditions of sale, Triton XXIX session page) and cngcoins.com (selling with CNG page) and NumisBids sale terms pages blocked to our fetch; fees and rules can change, so confirm them on the sale page.