Auction house vs coin exchange
Auctions and exchanges both match buyers with sellers, but they do it on different clocks and cost structures. Auctions shine for rare and unique coins; exchanges suit coins that can be grouped into interchangeable classes. Here is how to think about the trade-offs.
By Changes Hands Research · Updated Nov 3, 2026 · 4 min read
How an auction house sells a coin
You consign the coin. The auction house examines it, often recommends certification if it is raw, photographs it and assigns it to a sale, which may be weeks or months away. The coin appears in a printed or online catalog, bidders compete during a set window, and the hammer falls once. After the sale the house collects from the buyer, waits for payment to clear, and then pays you. From consignment to cash, the process typically takes well over a month, and for big sales it can take several.
Auction houses are paid on both sides. Buyers usually pay a buyer's premium on top of the hammer price, and sellers pay a commission, sometimes with extra charges for photography, lotting or insurance. Rates vary by house, by the size of the consignment and by negotiation; large consignors pay less than small ones.
What auctions do well
For a genuine rarity, nothing beats a well-run auction. The house puts the coin in front of serious collectors, writes up its history and pedigree, and creates a moment where two determined bidders can push the price well beyond what any single dealer would offer. Unique coins, important collections and coins with no recent comparable sales all benefit from that kind of competition. Auction archives also become the public record that later buyers and sellers rely on for pricing.
Where auctions struggle
The same machinery is expensive for ordinary coins. Commissions on both sides take a large share of the final price, minimum lot values push lower-value coins into bulk lots or out of the sale entirely, and the long timeline means your money is tied up and the market can move before the hammer falls. Price discovery happens only at the moment of sale: between auctions there is no live price, only the record of the last one.
How a coin exchange works
An exchange works more like a stock market for physical objects. Coins that are interchangeable to a buyer, for example any PCGS MS64 1881-S Morgan dollar, or any common-date Buffalo nickel in a given grade band, are grouped into a class. Each class has one order book where buyers post bids and sellers post asks. When a bid meets an ask, the trade executes immediately.
Because the coins are already authenticated and held in a vault, the trade settles by changing the ownership record. Nothing has to be shipped, and the buyer can resell the same afternoon. The order book also shows prices continuously: the best bid, the best ask and the last trade are visible at all times, not once a quarter.
What exchanges do well, and where they do not fit
Exchanges are strongest where coins are numerous and standardized: certified common dates, bullion coins, circulated silver, and house-graded common-date pools. Costs are lower because there is no catalog to produce and no auction event to stage, and settlement is fast because the coin never moves.
They are a poor fit for coins that are truly one of a kind. A coin with a famous pedigree or a rare variety does not belong in a pool, and a class with few participants may have a wide gap between bid and ask. Those coins are better served by an auction or a specialist dealer. Exchanges also require you to accept custody: the convenience comes from the coin staying in the vault.
Side by side
A general comparison; actual terms vary by auction house and by platform.
- Fees: auctions typically charge buyers a premium and sellers a commission. Exchanges typically charge a smaller fee on one or both sides of each trade.
- Speed to sell: auctions run on a schedule set weeks or months ahead. On an exchange you can sell at the best bid at any time, or wait at your own price.
- Settlement: auction proceeds usually arrive weeks after the sale. Exchange trades settle when they execute because the coin stays in custody.
- Price discovery: an auction produces one price per lot per sale. An exchange shows live bids and asks continuously.
- Best for: auctions suit rarities, pedigrees and whole collections. Exchanges suit standardized coins in volume.
- Low-value coins: auctions usually lot them in bulk or decline them. Exchanges can list them in bulk or house-graded classes.
Choosing for your coins
Many sellers end up using both. A sensible approach is to identify the few coins in a collection that are rare, high-grade or historically significant and talk to an auction house about those, while selling the rest through a channel built for standard coins. Get proposals in writing, ask what all fees will be, and ask when you will be paid.
How Changes Hands fits in
Changes Hands is an exchange for vaulted, graded US coins. Buyers pay no fees. Sellers pay 3% plus a one-time grading fee, and only when a coin sells, so there is no upfront cost. Each class, from circulated 90% silver dimes to PCGS VF20 1893-S Morgan dollars, has a single order book where you can buy at the lowest ask, sell at the highest bid, or post a limit order. Coins are held in insured custody and owners keep title. How it works explains the full process.
Frequently asked questions
Is it better to sell coins at auction or to a dealer?
For rare, high-grade or unique coins, a competitive auction often achieves the strongest price despite the commissions. For common and mid-value coins, a dealer or an exchange is usually faster and cheaper once fees and waiting time are counted.
What is a buyer's premium?
A buyer's premium is a percentage the auction house adds to the hammer price and charges the winning bidder. It means the buyer pays more than the hammer price, which bidders factor into what they are willing to bid.
How long does it take to get paid after a coin auction?
It varies by house, but sellers typically wait until the buyer has paid and any return period has passed, which usually means several weeks after the sale, on top of the time between consignment and the sale itself.
Can rare coins trade on an exchange?
Yes, if they fit a defined class. A certified key date such as an 1893-S Morgan dollar in PCGS VF20 can have its own order book. Truly unique coins, such as those with famous pedigrees, are usually better suited to auction.