Where can i get the Best price on an exhaust system???

kinda late to this thread but I wish I could say the same about muffler shops around here. the one who puts on the local cruise night has given me 4 different prices for the same exact set up as well as tried telling me that 3 inch pipe was $80 for one 4ft section. I call BS, summit sells them for $16.97 a piece. I'm going with 3 inch, open pipes, no crossover, 45'd coming out in front of the rear tires. they've told me $200, $250, $325, and now $400. I think they're out of their minds.