[quote name='saetia']Attn: All past lowball auction havers
Out of courtesy, which is the standard way to handle non-payers? How long before I can declare the transaction moot, and re-list their items? Thanks.[/QUOTE]
How many times have you tried contacting them? Have you seen that they've been online since you've sent PMs? Some people bid and forget, it happens.
I'm pretty sure that negative feedback can be left for non-payment, so I'd contact a mod if it's been too long.