Posted By:
AdamI would send that person a home-made counterfeit version of whatever card you sold him for $400. Just get some paper, cut it into the size of the card, and get a few markers and take a solid 10 minutes or so to "create" the card. If it ends up looking kind of like a child's drawing, that's perfectly fine. Then mail that "card" to him along with a postive note inside the package, something along the lines of "Congratulations on winning! Please leave positive feedback and I will do the same!"