Ok so my stock muffler is all rusty and I'm looking for an aftermarket muffler.

I took a look mufflers on ebay and they all seem to be "no-name" piece of crap mufflers...

My questions are.

1) Is there any difference between the no-name mufflers and the real ones like (5zigen, apexi, greddy, tanabe etc...) ??

2) If there is no difference, where can I find a cheap bolt-on muffler? Don't say ebay because they're all weld-on and they're a pain in the ass to install.

3) How hard is it to install a bolt-on muffler? I have some hand-skills but no experience involving car parts.

I need some straight-forward answers. Thanks.