@felleg Ha! Yeah, that would be a cool feature. Does anybody have any databases on that type of information though? I know Atari-Age rates the rarity of 2600, 5200, 7800 and Lynx games and I don't think that information changes at all, but they don't keep records of any prices as far as I know.
I think if this feature was added you'd have to have the ability to shut it off, or maybe people would just have to make altered versions of skins that would show it. I don't think that everybody would want that information showing up by default, but I do think it's a cool idea.