I'd pass. Parts are so cheap nowadays. Spend the extra money and get yourself parts with the warranty. Example system 500GB HDD $50, Asrock motherboard $70, Athlon II 3.0GHz $70, 2GB RAM $55. Good case between $80-$120 LCD monitor $150-$200. Okay Graphics card $75.
Otherwise tell him to knock $20 off the price. Plus check it is a legit version of Windows 7.
