Oh ya, people do it all the time !

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2489297106&rd=1&sspagename=STRK%3AMEWA%3AIT

As you can see they aren't worth much once your done.

Fun project but what's the point ?

http://www.barebones.net/machines.htm These guy have done many.