why do sellers change asking price to sold after a sale?

[Snapolit1]

I've done it a few times, and other times haven't. If it's a knocked down price, you may get a bunch of emails like "Had I known you were going down to $425 on that card. . . . " Those are annoying too.

My attitude is a negotiation is a private matter unless both sides want to disclose it.

I'm also sure many people on the board have done transactions before where the details of which weren't publiclly disclosed. Don't see how this is offensive to anyone. Private negotiations remain private until the parties decide otherwise.

BTW, why would you have that much interest in the sale price of a card you had no interest buying in the first place?