Unfortunately people can troll ebay auctions by bidding on items and not paying for them, sellers are unable to leave negative feedback for buyers.
For the seller, I'd hope the buyer follows through but I'll be keeping an eye out to see if this is relisted.
as the seller of this coin, I'd like to add:
IF you're looking to see if it gets relisted, I hope you saved the public key code to verify a "relist".
For I do have another one to list later - same other than code.
Buyer did pay me for it just fine,
I've sold a number over the years and have never been stiffed - YET!
I have seen ones I've sold get sold again later by someone else (some times not the buyer interestingly).
while we can't leave negative feedback, ebay WILL put a black mark in their history for winning a bid and not paying. They can be suspended or barred from ebay if it repeats.