I would get an Original Equipment one, Probably can be had for around 500-700. I would not get a rebuilt one, I had one in my car and was never as cold as the original one it replaced. I actually have a used ac compressor out of an 86 300E with manifold hoses too and clutch. If your interested, make me an offer.
93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K