I'm trying to geta flowmaster this weekend for my blazer, and the chevy dealer told me that I should be able to find it in some stores for a relatively cheap price. around 70 to 90 bucks...is there truth to that?? and if so, where do you guys think I can find that?

That's about the price range for a Flowmaster muffler. When I was checking I was interested in the Super 44 (I like loud).

http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Daps&field-keywords=flowmaster+super+44&x=0&y=0

Listed prices on those guys are ~$90, but that is the more expensive muffler. A delta 40 should be cheaper. And if you want to just order the muffler, you can go to an exhaust shop and have them put it on, a single in, dual out usually runs about 200-300 bucks for the complete install, but a simple flowmaster muffler install can be done at mieneke for cheap.

I got my Flo Master Delta 40 at CarX instaled for $160

Had my super 40 installed for $100 but mine single in/out with just a turn down.