We are selling our Macs and upgrading, hoping to get a Mac Server too.
These are both solid machines. the iMac is easy to ship being all in one and having the original box.
Apple PowerMac G4 500 w/ 704MB RAM, MSOffice 2004, wireless - $400
http://boston.craigslist.org/gbs/sys/354630087.html
Apple iMAC G4 15"/60GB HD/800MHz/768MB, MSOffice, PhotoShop, Ill... - $500
http://boston.craigslist.org/gbs/sys/354853605.html