I'm not sure if I believe that site....I check an iMac G3 500 MHz and it listed it as $400-500 which I've never seen a used one sell for that much...I'm trying to sell my iMac G3 for a used PowerBook G4 and I would expect $200 at the most for an iMav G3....as for an iMac G5, it probably might go for that much.