a front pipe as well as a centeral pipe by 300 bucks for my mazda 626 at Midas2 months ago, excluding the muffler, which would be charged extra 150 bucks. I know some products sold at Canadian Tire, which can be used to patch such defects as small holes of your muffler, but do not work for serious problemes. you can try one of them. otherwise, if you are going to drive your car for a long time, you'd better to replace all of them at one time in order to save labor.
by the way, you can visit midas' web site to get the location closest to you.
I did not compare Midas' price with those of others, so, I don't know the price it charged me was fair or not.