Posted By:
EricI think you covered yourself pretty well.
1) You provided a link so potential buyers could see an enlarged image of the card they were bidding on.
2) You state: No returns on graded cards.
3) You state: If you have any questions, Please ask.
You can't be clearer than that. It sounds like you're dealing with someone that is computer illiterate and should not be bidding on ebay to begin with.
I guess the only question is: Are you willing to take a hit with negative feedback?
He has no case. It's all up to you.