I had 2 auctions end last week. Haven't heard anything at all from one buyer. The other one was bidding on another auction of mine that ended a few days later, and I told them they could wait to pay until they saw if they won the item (they didn't). I sent "friendly" reminders to both yesterday stating that it had been over the 5 days I ask for payment in and have heard nothing back. Would you send an e-mail with a more threatening tone, or just report them to e-bay now having already sent them a reminder e-mail? I guess I've been lucky in that I haven't had to deal with this before.