got my frame, swingarm, engine mount brackets, battery box, and trees done for 300. that was blast and coat. its not bad. after having my first encounter with powdercoating, i coulda just painted it with some quality enamel and been just as happy with the result.
just a tip. watchout on coating aluminum. when they go to bake it, heating the aluminum will anneal it. so if you have a part that requires bolting to your aluminum piece, you may cross thread it. so far i've had problems with my upper tree whenever i went to bolt accessories to it.