Depreciation is a bitch. Unless there is some sort of bidding system in place once you have accepted an offer you are obliged to sell at the agreed price even if You get a better offer.edit however you don't have to accept an offer you can wait and see if some one will give you your asking price(You may end up loosing the 1st offer and end up selling for less but these are the risks you take). Just ask yourself how you feel if some one said they'd sell something yo you then told you no they were selling it for more yo some one else?