I made a web page listing web sites where you can buy ancient coins. If you want to spend a lot of time looking at obscure ancient-coin-sale sites, here are the links: http://augustusmath.hypermart.net/dealers.html My first idea was to list fixed-price sites that are not well-known. Then I decided to add in the well-known sites and auction sites too. I tried to list them with the most useful at the top and the ones that are hardly ever restocked at the bottom. If you buy from an on-line site that is not listed, please let us know and I can amend the page.
It seems rather comprehensive to me. If I can think of another, I'll let you know. BTW, I have it bookmarked for reference. Thanks.
You should add this site as well, http://collectiblescentral.com/ You can build a favorites list that will alert you if any thing you are searching for comes to auction. I use this quite a bit for my cards and have recently added some coins I'm looking for. There are not a ton of coin auction sites they are linked with, but it at least covers a few.
I took a look but didn't see any ancient coins in their store or in auctions... only slabbed Jefferson nickels, Ikes, etc. Did I overlook the ancient coin section?
I was digging through the auction houses they are linked with a little more and most are modern issue US coins.