Just 4 months back (june 2010) i bought Sapphire Toxic 2GB 5850 for 18.5k (399$) and now you have the 6870 which comes for 250$ (incl shipping) i.e. 11k and 5% faster than 5850.
http://en.expreview.com/2010/10/27/exclusive-review-for-radeon-hd-68706850/11124.html/22
Newegg still has the 2GB 5850 for 370$ but I guess it will be still listing only...
Newegg.com - SAPPHIRE Toxic 100282-2GTXSR Radeon HD 5850 (Cypress Pro) 2GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
http://en.expreview.com/2010/10/27/exclusive-review-for-radeon-hd-68706850/11124.html/22
Newegg still has the 2GB 5850 for 370$ but I guess it will be still listing only...
Newegg.com - SAPPHIRE Toxic 100282-2GTXSR Radeon HD 5850 (Cypress Pro) 2GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card