Best way to make members aware of someone ripping people off in trading section?

in consideration of the strangeness of the seller being unusually absent - I caution you to tread lightly with a call out - I think Joey it hinting that there very well may be an extenuating circumstance here... I have seen a couple guys "eat their words" on here after bitching about a transaction and then discovering the truth of the matter... tough situation on both sides it seems.