$900 BIN or $600 right now at auction: Supermicro 1U Dual Intel Xeon E5 2650 16 Core 32 12GB 128GB 813M X9DRL If Server | eBay 1U and has some ram (eeek 2GB sticks) and a 128gb ssd.
Also lower spec but OK - Supermicro Sys 5017R MF 1U Rackmount Server Intel Xeon E5 2620 16GB RAM | eBay $450 ain't bad.
Also lower spec but OK - Supermicro Sys 5017R MF 1U Rackmount Server Intel Xeon E5 2620 16GB RAM | eBay $450 ain't bad.