Sans Digital TowerRAID TR8M - 8 Bay SATA to eSATA (Port Multiplier) RAID enclosure - 8 bays, comes with all drive trays. Pretty sure I still have the PCIe raid card that came with it kicking around somewhere if you need it too -- I never used it (see below for the cards I used). EDIT: Yes I have and will include the original PCIe RAID card that came with this unit. $100.
2 x Sans Digital 4 bay SATA to eSata (Port Multipler) RAID enclosures, similar to the 8 bay above, but only 4 bays each. Drives directly insert (no drive trays). $50 each.
2 x Newer Technology MAXPower 6G RAID PCIe RAID cards, supports port multiplier cases (like all of the above cases). $50 each. Card Specs
Willing to do local meetup, cash or EMT only. I'm located in Oakville but willing to meet somewhere closer to you if required.
These cases and cards served me well but I have moved on to a larger rack mounted SAS unit and don't need them any longer.