Let's clear this up. Min system requirements for XP Home:
CPU: 233 Mhz (300 Mhz recommended, but not required)
RAM: 64 MB RAM (128 recommended, but not required)
HDD: 1.5 Gigs.
Installing SP2 *only* requires an additional 1.8 Gigs of HDD space, no upping of either CPU speed or RAM amount.
Confirmation:
Wiki:
http://en.wikipedia.org/wiki/Windows_XP
Microsoft:
http://www.microsoft.com/windowsxp/h...g/sysreqs.mspx
Jumping back on-topic... PC, I would try to get $225 for it, but be prepared to give a little most likely in terms of price. Might I ask how much you paid for the CPU and HDD? If gratis, or not too much, have you considered donating to a local firehouse or Salvation Army center so they can pass it along to a needy family without one?