This recently happened to me as well - for a $115 card Grover Alexander card. It was shipped with 5 other cards, and the buyer claimed it wasn't in his package. I know for a fact I shipped it, and the package wasn't damaged.
I provided him a refund with a smile, knowing he was lying. I didn't even wait for a case to be opened. The garbage still left me a neutral. I'm still pissed by the principle of it, and the amount of money, but if some d*bag is going to sell his integrity for $115, I'll let him do it.
Also, I looked up his feedback...and he has left 32 Neutral/Negative since 2011 over very similar things on only 576 feedback left. Now that is a
remarkable %. He seems to periodically do this, a self created coupon perhaps - knowing eBay will side with him. In only 23 items/feedback received for him this past year - he has had 4 Negative or Neutral left for him.
eBay user: 11*marko
http://toolhaus.org/cgi-bin/negs?Use...o&Dirn=Left+by