I just noticed that newegg is having a 'special' on the XFX 6870 for $184.99 with the following promo code:  CEMCKCHC23

It was emailed to me directly so it may not work for you or it may only work once.

The mining guide says 190 so this isnt a huge dead but I wanted to post the promo code just in case.
6870    $190    Easy    278.31 (hashrate)