Bump for a sweet car, good luck with the sale. I had a Cosmos '97 Dinan M3, S1 though, so naturally aspirated. That was the most fun a guy could have with 275hp on this earth. This would make a great track day toy especially with all that extra power.
I imagine he's already got it up on bimmerforums, etc., if not, they have a pretty big E36 crowd.