You should have a problem with account sales if bitcointalk means anything at all to you, because there's nothing good that comes from an account changing hands.  The new owner could leverage the previous owner's reputation to scam someone; they could be an account farmer or a bounty hunting shitposter who's going to leave a trail of nonsense posts all over the place, and probably more, too.

Nice research on this one.  When I pulled up this dude's post history, I could only see some posts from 2015 and one from 2019, but there's definitely been a change in writing style.  Some might argue that it's not proof an account changed hands, but to them I say: it's more than enough for me to tag someone

Which I just did.  Account buyers and sellers are all in need of a nice red paint job.