Some Radeon HD 4770s have gone on sale for less than $100. SuperBiiz has the Sapphire model for $99 - 10 per cent coupon (code 'BLACKFRIDAY') + $9 postage =
$98.
Newegg has a Diamond-brand card for $120 - $30 rebate =
$90 AR -- though there will probably be a postage fee. And tax in my state.
Note that the Sapphire model has DVI, HDMI, and VGA, whilst the Diamond card has two DVI ports (and comes with an HDMI adapter). They both appear to be stock speed.
Edited: bloody hell, this still isn't cheap enough. Though the HD 4770 generally beats the GeForce 9800 GT, often it's not by a huge margin -- and there are a handful of cases where the 9800 GT beats the HD 4770. These deals will still cost about $100... versus
$80 for the PNY 9800 GT (550 MHz, low-power model) on Newegg, shipped -- that's a 25 per cent price difference.