645a toner cartridge 1-pack 645a black toner replacement for hp 645a c9730a toner for color 5500 5500n 5500dn 5500dtn 5500hdn 5550 5550n 5550dn 5550dtn printer ink is up for auction in Office Products. This item is in As Is condition. This auction has ended — similar items appear in live auctions regularly.