Newegg via eBay offers the EVGA GeForce GTX 1080 FTW 8GB 256-bit PCI-Express 3.0 Video Card
, model no. 08G-P4-6284-KR, for $649.99
for shipping. That's the lowest total price we could find by $86. It features a 10,000MHz effective memory clock, 1,607MHz core clock, ACX 3.0 cooling, OpenGL 4.5 and DirectX 12 support, three DisplayPorts, one HDMI, and one DVI port.