Recycled Cycles in Seattle definitely has pedals for you in the bins (I saw some in there with cheap nylon straps that were actually new), saddles are hit and miss, but 90% chance that you will find a decent one, and absolutely you will find a good stem threaded or threadless there for $5, too. I get a lot of stuff there. They put new stuff in the bins daily! Just catch the bus to the bottom of the U-District. They are on Boat street. I even have extra stuff I could sell you if you don't have luck there (but you will).