I don't think it's a marketplace issue truthfully, outing him as knowingly overstating grades on e-bay doesn't look good at all ...I don't think there's anything actionable other than sharing what you found to warn others.
You did that & Chip obviously is doing some things wrong, his only defense is that he starts his auctions at a low price. On e-bay grade/price go hand in hand, I usually ignore what a seller quotes & look at scans anyways. That still doesn't make him right.
I personally think this is just TGT butthurt carrying over to here. There seems to have been a pattern of judging Chip and Chip's offers harshly, one or more people over there have been continuing to take a keen interest in his participation in that thread since the beginning.
I'm sure people are busy cleaning up their e-bay history, post history, squaring up charitable history, photobuckets, facebooks, etc...so that they can come over to participate The Giving Tree thread, give away a book (as per PGM results) only to have it get researched enough to blow up in their faces like this has for Chip.
Surely with all of this disclosure at Chip's expense we'll learn who did the "pointing" shortly.
No disrespect to those that are honestly invested in trying to make the trading threads work, but it really does seem like it's the same 10-15 people who are in a constant state of butthurt over them. I'm a little tired of seeing these silly PIF/TGT/Trading thread vendettas spill over into the other areas around here.