I have an OEM M5 exhaust and front calipers/rotors/pads for sale. Sorry about the pictures, but if you need some closeups please PM me and I'll see what I can do. I'd figure shipping would be pretty expensive on these parts. I've heard that Greyhound's freight rates are low. I'm up for any suggestions, local pickup is welcome, I'll accept Paypal. Onto the parts!
The exhaust is in good solid shape except for the polished exhaust tips. It also looks like a bracket had been welded onto the center section, perhaps to suit the E24? I'm not sure. I've uploaded some pics here.
I pulled the front brakes from the car as well. They look to be in fine shape, but I've never driven the car so I can't make any promises on condition. They did work well enough to stop the car at the bottom of my driveway, and didn't seize up. The driver's side was a struggle to remove, possibly due to the surface rust on the rotors, possibly due to a stuck piston.
The entire S38 engine is also available, but it had spun a rod bearing. I'm told that it currently resides in a machinist's shop after having been repaired, along with matching bearings. It is a complete package, including the harness, DME and exhaust header. I'm not sure if the clutch & flywheel are included though. I'd prefer to sell it as a package. If anyone is interested, I'll get you in touch with the owner to complete that transaction.

