I don't know about the relative pricing of these coins, but $550 to $625 doesn't seem totally out of line to me. I bought my coin for around $700 from Classical Numismatic Group (CNG) a few years ago and the prices seem to have gone up. Mine was sold as "good EF" and is from the Side mint which I think is a less-common mint and may add a bit to the price. I would recommend CNG as a trustworthy dealer but I don't think they will be the cheapest. They have a nice website.
I've posted my Alexander before, but this seems like an opportunity to put it up again!


I've posted my Alexander before, but this seems like an opportunity to put it up again!




















