cheapest sapphire 4870x2 is just 419$Goku said:The cheapest price I found for the HIS 4870x2 is here :
HIS H487X2F2GP HD 4870 X2 (Full HD1080p) HDMI 2GB (2x256bit) GDDR5 Dual DL-DVI & TV (HDCP) PCIe (RoHS) (NO STOCK).
and for the sapphire on newegg is:
Newegg.com - SAPPHIRE 100251SR Radeon HD 4870 X2 2GB 512-bit (256-bit x 2) GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Desktop Graphics / Video Cards