Wouldn't the fact that it has a sticker on the front of it devalue it even more? Sure, you could take it off but God know how long that sticker has been there and whether it would come off completely. And if it's yellowed, it's going to have a completely new section in the shape of an Apple.

Come to think of it, that would actually be rather interesting. Of course, then he would sell it as an 8500 "prototype" with an Apple embossing on it.