Cheap fun shopping sites

Some of my friends tell me there are sites where you can get brands like fox,billabong,or good name brands for cheap. Can anyone give me some?
I mostly want to look up sweatshirts,or jackets and such.

ebay is one
a lot of people dont want new things they get, especially clothes
theres tonas of clothes up for grabs from brands like those
also sometimes you can find new things from op-shops...no kidding
even big brands like that
as well as older styles too