Hi! Been looking through eBay and found some really nice Prada bags. I have never purchased a single thing from eBay in my whole life so I don't know who the real authentic sellers are and who aren't.How do you guys tell one from the other? I've seen some fakes too, don't get me wrong. But some of the bags do look real. For those who are frequent eBay buyers- can you please help me out? What are the list of things/signs I should look for in picking a seller? Thank you!