My first Cointalk post! I bought this coin on an online auction site (not eBay). I've identified it as an Agathocles tetradrachm, and it looks pretty good. It has patina, shows wear, looks like silver and has no apparent rim seams. The problem is that it should weigh around 16.5 grams, but weighs 9.5 grams. I'm befuddled as to whether it's real or a fake. Your opinions are welcome. Thanks!
It doesn't look right to me. I put a lot of faith in Maridvnvm. If he says it's a fake, I think you can take that to the bank.
Thanks for all the great info! I had a strong suspicion it was a fake luckily, I still have time to get a refund. Another lesson learned.