Forum Ancient Coins is the Benchmark for proper numismatics, in the sense that being online it allows folks to learn all there need be about the subject.
Joe's website also needs paying for, so the money has to come from somewhere, so the consignments do that job.
So it is a reciprocal action, the coins for sale fund the website that provides a wealth of information.
Also the terrific work done in providing an online record of Fake coins.
When I started selling coins, I sold an AR Tetradrachm of Ptolemy XII to a buyer from the State of Michigan, USA, for £25.
A month later I saw the same coin listed on Forum for about $250.

A lesson learned, never to undersell a good coin.
If no one wants to buy at a sensible price, so what, it goes to my collection.

On Bulgaria, I notice on
ebay a lot of Bulgarian sellers, who base themselves in the Netherlands, Germany and Austria.
If they have their contact details on their listings page you will see the address in Germany, for example, but the name is Bulgarian and even the email address is ".bg" (Bulgaria).
For example, tying in to Forum, last year I bid on an auction, that Forum offers to members for free.
The seller had their address in Austria.
After winning, and paying via PayPal I saw the sellers name was Bulgarian.
Then the coins arrived, with the address sent from Sofia, the capital of Bulgaria.
Suffice to say, I did not buy again from the seller, knowing the laws Bulgaria has against the export of its antiquities, and it is obviously for this reason that Bulgarian dealers in ancient coins "set up shop" in other European countries.
I must add however that Bulgaria should not be associated purely with Fake coins. Bulgaria obviously has, even now, a wealth of antiquities including ancient coins, going back to the Thracian "Odrysian" dynasty as well as numismatic associations and publications, such as the works by Ivan Varbanov. This goes a lot to counter the marring done to the country by the makers of Fake coins in that country.
And it must be added, that there are other countries where Fake coins are produced.
There is here, England and there was (if not still) the notorious "Toronoto Group" of Canada.
So to end, it is best buying ancient coins from a known, reputable source which can be an actual Shop or on
ebay which has hugely tightened the rights of Buyers v Sellers.
Forum, back in 2003 (at least) was the Benchmark in doing this kind of quality guarantee and still is.

