Why not send the guy the profit you made off his cards and get a little of your good name back? Seems like an easy way to end all of this.
When I post a price, I will not respond if you ask for a "best price" of if I "can do any better." If you want a better price than the one posted, please counter-offer.
My SportsCardAlbum: http://sportscardalbum.com/u/gamboooler