[Fred]

The best way to "bring attention" to an "aggressive" selling tactic involving inflated price disclosures favorable to the seller would be to provide other pricing without any extra commentary. At some point, if the aggressive seller persists, then everyone will figure out that person may not be a community member worth dealing with.

Something to consider is that if someone doesn't include any past sales information but is obviously "high" in price, then refrain from commenting and just let it go. Else the BST will become a free for all.