I had a similar situation very recently. I ‘won’ an auction for a Nomex flying jacket, which the seller asked for payment within four days. I payed straight away, and waited for a week. I heard nothing from the seller, who’s in the US, and his site said it hadn’t been shipped, so I dropped him a note. Still nothing. I waited another week or so, and contacted him again.
Still nothing, so I contacted eBay and started a dispute case, which I was reluctant to do, the seller had a 99.8% rating. eBay gave me a month to see if I could resolve the situation, so I emailed him again, asking what the problem was, giving alternative email addresses, etc. Nothing doing.
eBay contacted me again asking if the situation had been resolved, so I said no, and gave them the situation. They asked if I really wanted to pursue the case, I said yes, and they said it could take up to 48 hours to resolve.
Two hours later, I heard from eBay, saying they’d found in my favour, and refunded the money I’d paid and postage straight away.
I have no idea what the problem was, unless the seller had died, or been taken ill, or what, but it was resolved quickly and easily, which I was very happy about.
I’d still have preferred to have the jacket, though I’ve now found another unworn one on a BIN sale, for just a little more than the first one, so all’s not lost.