I'd say half the price will be having windows xp on them..
Just ordered parts to build two computers for simple game playing and with wireless networking.. Cost me around $700 US, whatever $1000CDN works out to.. $300 CDN for a 52MBps wireless router and 3 nics to match.. 512MB ram each, nforce2 matx boards with geforce mx video on board..2 cases, 2 sempron 2400+ cpus, etc..
So looking at $350 CDN per machine, or around $250 US, just add hard drives and cd burners, which I had already lying around..
Compared to prices 10 years ago, it's a steal.. lol