I saw this coin on ebay, and I am curious the date of it, and possibly even an exact name. It is Constantine I, minted in Cyzico, but I have no idea of the date. You can click the image to make it bigger. Thanks guys!
Constantine I AE3 (Bronze size 3, exact name of denomination not known). Minted in Cyzicus, 333-334 AD. Attribution: RIC VII Cyzicus 77. Anything else you need to know?
I would pay $5-10 for it. Its probably worth up to $15-20, depending on who you're dealing with. Remember: Age does not equal rarity!