Originally Posted by Chuck33079

On a lot of these ebay exhausts, the mufflers will blow out and they'll end up sounding bad.

Originally Posted by JARblue

Not to mention the value some of the more reputable brands hold. A $1500 Fast Intentions exhaust can easily sell for $1000 several years later. Having to replace a $300 eBay exhaust once due to rust or something can end up costing more than the investment in a FI exhaust.

That's not to say that all eBay exhaust are terrible and will fall apart in a couple of years. Clearly some are better than others.