I have an a/c compressor - two, actually - out of an '01 A4 for sale, cheap. First one is from a salvage yard and said to be out of a running car. Looks weathered, probably cause it's been sitting out for a while, but pulley spins fine. I was going to use it to replace the second unit I have, which is now out of the car with a noisy pulley, though it still compresses just fine. Mix and match to make single working unit. New these things are $1200.