hey guys i recently bought a 2000 maxima gle. since i bought it, it had this noise coming from the exhaust which sounded louder than most stock exhausts. also i noticed the the car was starting at 2000rpm and took a while for the rpm to decrease when idle. i figured there was a leak in the exhaust so recently i decided to get it on a lift to check whats up and it wasnt the best of scenes. the pipe connecting the muffler was completely rusted in 2 about 10 inches away from the muffler. the muffler is completely disconnected from the rest of the exhaust system (which is all very rusty). i also noticed that the system is pretty much 1 piece and was told it would be $600-800 to replace at the dealer

. i havnt gone to the dealer yet but any recommendations on what to do? new stock exhaust system from the dealer or other alternatives? anyone had this problem before?