Unpaid item case after i relisted it and sold it?

I put up an Iphone 4 on ebay, someone bought it but never paid. After 2 days i messaged them asking what was going on and they replied "i don't want it, it's verizon"---obviously this person is an idiot because it clearly said Verizon in the title. However, i relisted it and it sold. But now i want to open an 'unpaid item' case in ebay. But i no longer have the phone because i sold it, so if they do pay… What do i do?

You should have opened a not paid case first and closed that before you relisted and sold. In theory the original buyer can still pay if you open an unpaid bidder dispute. Then you're going to have to refund them before you no longer have the phone.eBay and the original buyer aren't going to like this, resulting in negative feedback and 1 star ratings. Better that you send the original buyer a cancellation request which renders the original sale null and void and you don't have to pay final value fees on that sale. If it goes through as paid and you have to refund, eBay will still charge you final value fees on that first sale as well as the second sale when you actually sold your phone.