I know I am late with this, but the Xerox Alto I posted about on Ebay…
http://8bitaficionado.com/2010/10/13/xerox-alto-on-ebay/
After 22 bids from what looks like 22 bidders, It sold for $30,100.00
Here is the ebay link:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320602942545
I said it would go for the price of a car..