So far so good
I have been for some years buying through Ebay and I must say that -for me, of course- is second to none.
They back up in case of trouble is impressive. Only 3 times I had minor problems and always I've got my money back or a replacement in prefect conditions.
They classification of "Top seller" is like a Holy Book. Normally the sellers did start the refund or replacement as soon as I did complain and their after sales service is impressive.