More Exhaust Questions and Concerns

[hmrlvr]

Aren't all these exhaust systems just a different muffler, some piping and a couple "TIPS". A muffler for $100.00 and two tips at $50 each with a muffler shop welding it all together shouldn't be more than $250 or $300 bucks. Am I missing something? The dyno charts all pretty much look the same to me (not that I know what they mean). I will be upgrading my exhaust but at what price? Am I just paying for a pretty package when I buy the system complete? And, these tips will be torn off or at least damaged with any sort of offroading except maybe fireroads. Thankyou Evldave and Edspad for your earlier remarks.