I recently sold a vintage nine west bag that is actually very interesting shape (it reminds me of the uniqueness of the mini sac hl of vuitton) and the buyer said she would send payment through the mail. I was trying to be nice and waited a long time, and its now 18 days later, I'm assuming thats about 12 business days. Because I haven't emailed her for payment I'm now afraid that she's going to accuse me of not delivering the item. At the same time I suspect that she's a deadbeat bidder. It's my fault, I shouldn't have waited so long to email. What is the best way to resolve the situation.