Update: The buyer has apparently backed out of the purchase, claiming the bid was a "mistake". Here's what the seller had to say:
The unfortunate reality is the second I approached the winning buyer with payment options, they retracted their bid claiming it was a "mistake." I'm not offering the item to other bidders in the auction to see if any of them are honorable individuals. It may take me a while but that's about all I can do for now. It would be nice if eBay were more seller-friendly, rather than 100% buyer protection focused.