Supermicro SC836BHA-R1K28B with rails for $282 on eBay (sorry, only one ).
That's the high-availability one with a 9K RPM fan wall (for even more noise!) and a bay and PDB for a 3rd PWS-1K28P-SQ power supply. Given that one of those power supplies is around $100 on eBay[advertising link], 2 plus a chassis for $282 seems like a steal. I guess more people want the expander backplane versions - there were only 2 other bidders on it.
That's the high-availability one with a 9K RPM fan wall (for even more noise!) and a bay and PDB for a 3rd PWS-1K28P-SQ power supply. Given that one of those power supplies is around $100 on eBay[advertising link], 2 plus a chassis for $282 seems like a steal. I guess more people want the expander backplane versions - there were only 2 other bidders on it.