I have lot of 71 assorted HP Towers Available.These have been tested working. Looking for best offer! Lot includes the following HP DC7700C Core 2 1.86Ghz 2GB Ram 160Hd Dvd-Rw Win XP Pro Coa------62 HP DC7800 Core 2 Duo 2.33Ghz 2Gb Ram 160Hd Dvd-Rw Win Vista Coa----6 HP DC7900 Core 2 Duo 3.00Ghz 2Gb Ram 160Hd Dvd Rom Win Vista Coa---3