Thanks for all the interest, guys.
2 fronts - Michellin PS2 245/40ZR18
2 rears - Michellin PS2 265/40ZR18
The tires are essentially brand new, and the rubber whiskers on all four are still intact to prove it. I will send close up photos of each tire to anyone truly interested. TireRack sells a set of these new for about $1300.
I bought a set of OEM 18s rims and tires off a guy who was putting aftermarket 19s on his M3. These 18s were driven home by him from the dealership, immediately taken off, and then packaged off to me. I bought them to use the 18 rims for snow tires and immediately put a set of Pirelli Sottozeros on them. The tires have been sitting around unused ever since. I kept them in my basement thinking I would use them for the track, but that never materialzed. The wife told me I am way too old to be playing around at the track. All told, the tires have less then 50 miles on them, and probably less than 30. No exaggerations.
I am in the DC area, and of course would prefer a local buyer. I will cooperate with people to ship, though, with the caveat that shipping costs would be paid by the buyer.