Yeah but the seller has to be pretty desperate to do that - there are plently of guides out on the web - plus some buyers are totally unrealistic(and highly paranoid) - unless an item is MIB or MISB how many loose items are going to be mint(c9+)?, these are toys and they are over 20 years old, all are going to have some sticker wear or the odd scuff/scratch.
Be an informed buyer and if you are happy with KO's then so be it!