I've tried thrift stores, but it's so hit and miss that it's really hard for me to consistently shop there. I'm very much in denial about clothes shopping until I absolutely need a new pair of jeans tomorrow or I'll have nothing to wear, haha. I also don't have much time off, so I try not to spend it shopping.
@franknbeans: I would love a pair of full chaps. But that's a whole other shopping issue that I'm not quite sure I want to get into right now. I do ride in half-chaps, but that does nothing to keep me from wearing out the thigh/butt/crotch area.