EBay prices for IBM M5014 may be firming. I picked up a gently used IBM BR10i off EBay for $35 (no bracket). It is a blast from the past, but for my home archival storage server populated by WD Reds, I can live with that.
As of this writting, he has 2 more at IBM ServeRAID BR10I PCI E 8 Port Controller SATA SAS 44E8690 | eBay
As of this writting, he has 2 more at IBM ServeRAID BR10I PCI E 8 Port Controller SATA SAS 44E8690 | eBay