i would make sure you do an item not received, that way there is a record of what has happened.. (or not happened in your case!) im not sure how that works when the seller is no longer registered.
did they have any previous feedback?

i hope you get your item!

i once had a lady pay me by online transfer, but she must have entered a number wrong, and deposited into someone elses account! lucky it was only $7, i felt terrible! but it wasnt my fault, so i couldnt really do anything!