I'd say it's a little much for a card that old. If it's something that you want to do, I'd meet with him and inspect the cards. See if he can give you assurance that they're running beforehand. If everything seems legit and he's not shady, I'd counter him at $320 for both of them or something like that, just to see if you can get him down a few bucks. They were $210 apiece the last time I saw them on Newegg ~9-10 months ago, just FYI.