Tonight I won a Dior keycase and I was going to pay now, but the seller is not longer a registered user. What should I do? Should I contact the seller? She was a 100% positive feedback with 23 feedback, but this fact seems fishy to me and I think I'm not going to pay. Am I doing the right thing? What if she leaves me a negative feedback (but really, can she? She's not registered anymore). Any advice?