Tell him to shut up, and wait till it's bumped away.
That's not a way to solve it 
I meant.. don't just tell him: "Hey, STFU noob!!1!" @-@
Tell him to stop posting in your thread if he doesn't want to sell you the deviling card, and.. uh.. let his post die. You'll bump your thread anyway, and the people who find your thread won't read all the bumps, just the first post, so they won't really read his response.
Your response was sufficient enough, don't you think so?

It's a small post by some random person, I wouldn't care too much about it.
