After getting the x10dri motherboard deal, I scanned their listings and noticed the last one. They don't include rails on this. Mine came with 128gb SATA DOM, 1280W SQ power supplies. If someone in the market for SC216B chassis with 216A backplane, could be a great deal if you can negotiate under $400.
SuperMicro 2U X9DRW-iF 2x Eight-Core Xeon E5-2650L 26x Hard Drive Bay ASR-72405 | eBay
SuperMicro 2U X9DRW-iF 2x Eight-Core Xeon E5-2650L 26x Hard Drive Bay ASR-72405 | eBay