Thank for your input. I have a old case, three hard drives, Dvd burner, modem, mouse, key board, moniter, ect. The new parts are the motherboard(mobo), cpu, ram, power supply, & XP OS
mobo = Asus P5N EM HDMI ($80), CPU = E2220 or E2200($90 or $70),
ram = (less than $25), power supply = (less than $17) @ priceline.com