Drive Mobile via eBay offers the VisionTek Radeon R9 390 8GB 512-bit PCI Express 3.0 Video Card
, model no. 900809, for $255.81
with free shipping
. That's the lowest total price we could find by $3. (Most stores charge over $300.) It features a 1.5GHz memory clock, 1,000MHz core clock, DirectX 12 support, HDMI, DisplayPort, and two dual-link DVI-D ports.