This is one of the best prices I've seen on these. If I didn't already have 6 spare PSUs, I would probably buy all of them.
SuperMicro PWS-920P-SQ 920W Switching Power Supply 80+ Platinum 6558051428839 | eBay
SuperMicro PWS-920P-SQ 920W Switching Power Supply 80+ Platinum 6558051428839 | eBay