My Mellanox ebay search popped this up.
It's a lot of 3 connectx-3 CX353A's, bidding at $26 + $14 shipping.
Lot of 3 Mellanox ConnectX-3 10Gigabit Ethernet Card PCI-e x8 MCX353A CX353A | eBay
It's a lot of 3 connectx-3 CX353A's, bidding at $26 + $14 shipping.
Lot of 3 Mellanox ConnectX-3 10Gigabit Ethernet Card PCI-e x8 MCX353A CX353A | eBay