I don't know such things, but with that number of unsold ads, the supposed price gouging, and not even being courteous enough to include pics, shouldn't this be flagged to the mods? Just seems like someone better in the know would probably consider this trend to be "toxic"?

So, if you know nobody likes a snitch and you know that everyone knows they don't like what would be snitched on and you know everyone knows that you know these things and you snitch... then what? Lol

It's overpriced if it exceeds the norms for pricing by a significant amount, because that's the colloquial definition of "overpriced." What you're referring to, OP, is something entirely different, which is "being able to scam someone."