I know exactly what you mean. it drives me nuts.

I have several accounts and sell for several other people. It so annoying when i have so many non payers at a time. sometimes one on each account. I put blocks in place, but it still happens. If they have no intention of paying, then why on earth do they bid? it makes no sense.

I give them a few days, then resend the invoice, i follow this up a day or so later with an email reminding them to pay. I follow this up a few days later with another email telling them that i will be reporting them the following day. Then the next day, i open a case against them.

Some people simply do forget or have an illness or something that prevents them from paying. I get that, but it just happens a bit too often. If they finally do pay after about 10 days, i feel like taking the same amount of time to get to the post office, but i don't, becauses they can give bad feedback and defects and i can't.