Some decent prices on eBay on 2 items:
Fusion-iO (iOScale2) 825GB SSD PCI-E F11-003-825G-CS-0001 Low Profile
$250 OBO FS
10/10 available
www.ebay.com/itm/291939089424
HP 1280GB PCIe ioDuo MLC IO Accelerator 641027-B21
$290 FS
1/1 available
www.ebay.com/itm/162277203281
Warning: Seller has only 1 feedback!
Good Luck!
Fusion-iO (iOScale2) 825GB SSD PCI-E F11-003-825G-CS-0001 Low Profile
$250 OBO FS
10/10 available
www.ebay.com/itm/291939089424
HP 1280GB PCIe ioDuo MLC IO Accelerator 641027-B21
$290 FS
1/1 available
www.ebay.com/itm/162277203281
Warning: Seller has only 1 feedback!
Good Luck!