I just had my first experience with a non-performing seller. I bought a item last Sunday, crickets all week, not even a thank you. I received an email from PM close to the 7 day mark saying the shipping was delayed but I could cancel after 7 days. So I went ahead and cancelled on Tuesday. Today the seller comments to me with a bogus story about how time got away from her. She offered to make a new listing for me but I just ignored. Maybe I will answer after a week. I noticed she was updating items last week, so she wasn't that busy. A suspiciously identical item was on eBay ... probably playing both ends against the middle even though she accepted my offer. In the meantime I sold some shoes Monday night and had them shipped by 9 am next morning. That's how it's done.