happen to see this at newegg.com and thought it was a good deal. these machines are hard to find under $500. these are open box units for $432:
Open Box: SUPERMICRO SYS-5018A-FTN4 1U Rackmount Server Barebone FCBGA 1283 DDR3 1600/1333 - Newegg.com
Open Box: SUPERMICRO SYS-5018A-FTN4 1U Rackmount Server Barebone FCBGA 1283 DDR3 1600/1333 - Newegg.com