I got scammed in a similar way although not through ebay.
Listed bike.
Contacted by ‘buyer’ and deal agreed.
Money sent by gift (I did not ask him to). The name on the PP was not his although he explained away by saying he was buying on behalf of a ‘mate’.
I send bike to address given, job done.
Few days later chap contacts me asking where his bike was. This chap was the bloke who payed but not the ‘buyer’. Turned out the ‘buyer’ had sold a spoof bike to the other chap and given my PP details to him.
Thought I was safe as the seller but the chap’s bank refund him as it was online fraud, then billed PP who in turn billed me. Ended up £850 out of pocket.
Be very, very careful is my advice.