Our definition of mainstream video cards encompasses the $100-$199 price range, and is really where you'll get the most bang for your buck. This is where you will find the latest mainstream video cards, like the Radeon X700 Pro and GeForce 6600 and 6600GT, along with a few higher-end products that have been replaced at the top of the food chain, and have then dropped in price.
The mainstream video card list is usually where we see a few noticeable price drops mixed in with a couple of high-end cards dropping below the $200 mark and entering the mainstream market. Last month broke this trend and we failed to see any new entrants, but with three new members, this month more than makes up for it. Two were the result of price cuts, with the ATI Radeon 9800 Pro 256MB (-$26) and ATI AiW X600 XT 128MB PCIe (-$16) falling into the mainstream crowd. The other is a bit more interesting, as the Radeon X800 128MB comes in out of nowhere sporting a $199 price tag, and offers a real opportunity to get a lower-clocked Radeon X800 Pro card for a value price.