I went to Value Village the other day and found a very good condition Helly Hanson packable rain jacket. It does not appear to have a breathable membrane, but it was definitely worth 3.99. I will probably use it once it warms up a bit. I already have a heavier weight snowboarding type breathable jacket that I am using now on the colder days. Due to that, I passed up a few waterproof breathable jackets from Columbia and Sterns.
I also found rain pants: Sierra Design with membrane in new condition and some old eddie bauers with gore tex. Those were pretty spendy at 4.99 each : - )
link to value village locations -
http://www.valuevillage.com/whoweare/us/