Can you give us a size or weight for this, preferably in millimeters and grams? We can't tell what denomination it is without that information, and without that, we cannot give a value. As for what I can tell, if it's authentic, it's from Ainos in Thrace, and best I can tell, it's from 5th or perhaps early 4th century BC.
Got this picture in a mail from a seller, but no more info. He is trying to sell it to me for 20 dollar, is that to much?
At that price, it's probably a fake. No matter the denomination, it would be worth much more than that. What information did this person supply about the coin?
Thankyou! It looks a little bit to good.. Now I found a real coin with the "real" price! Estimate: 25000 CHF Price realized: 22000 CHF THRACE, Ainos. Circa 412/1-410/09 BC. Tetradrachm (Silver, 16.50 g 1). Head of Hermes to right, wearing close-fitting petasos with knob at the top and beads along the edge Rev. ΑΙΝΙ Goat standing to right; to right, kerykeion; all within incuse square. AMNG II, 288. BMC 5. May, Ainos, Group XXXI, 259. SNG Copenhagen 395. Nicely toned and centered; with a fine classical head of Hermes. A few minor marks, otherwise, extremely fine.
If you want a second opinion about its authenticity, you might want to post about it here. I don't know much about this particular type of coinage, but there may be someone there who can confirm it fake. Out of curiousity, where did you find this? Is it for sale on eBay, or is it from somewhere else?
I decided to look up coins from Ainos on eBay, and I found this confirmed copy, which, as far as I can tell, is from the same mold as this one you've posted here (though you might want a second opinion from someone else here). There's little doubt that the one you posted is fake (not that there wasn't much a minute ago), and it seems that he is also either unaware of or lying about the denomination (it's a tetradrachm).
That new one looks very fake to me. Do you have a link to the guy's site or anything? I would like to make sure that people are aware of his fakes.
I don't want to say 100%, since my focus is on Roman coins rather than Greek, but I just spent the last several minutes looking up Athenian New Style Tetradrachms, and none of the ones I saw look like that at all. It's really, really fake looking to me, and I wouldn't touch it with a 10 foot pole. If he's charging a similarly low price for this as well, then there is no doubt whatsoever that it's fake, as this would be worth hundreds if real.
If he's charging that little for each coin, he knows just how fake they are. If he is not indicating the fact that they are reproductions in the descriptions, I would not trust anything he sells. Do you have his site or other information so that everyone else can know to stay away?
I do not have an Ainos (too rich for my blood) but will offer an Athenian New Style tetradrachm here for comparison to your last. The letters in the field name a magistrate name which varies from issue to issue. Your fake is terrible style on the obverse but the reverse could fool somone not terribly familiar with these. This worn one was $188 in 1989. If real, yours is in condition that would sell for $500+