I was just checking out some of the links on this site to be sure things were up to date and I happened to notice that there is an end of season sale going on at Performance Bike right now.
I checked the bike reviews that I have on this site and the Performance Bike links and although they are good prices, many of the models are really not marked down from what they were a few weeks ago.
One notable exception that I found was that there are a huge number of GT Bikes on Sale at Performance and many of these bike truly are marked down a lot from earlier in the season. There are a lot of 2010 bikes on sale and even a few 2009 bikes that you can get for a fraction of their original cost.
Check out the GT Marathon Carbon (mtn, full susp), GT Avalanche (mtn, hardtail), GT Traffic (hybrid) and GT Series (Road) prices at Performance Bike. If the links on these review pages do not get you directly to the specific model that you are looking for just key in the model in the Performance search box because there are some great deals on GT bikes right now.