This Z3 Coupe is listed for sale by Henri on the Kansas City Craigslist. The Hellrot Coupe is listed with 79k miles for $12,250. The only mods appear to be tinted windows and an aftermarket headunit. I have included a screenshot of the for sale listing at the bottom of this post, which also includes the sellers contact info, should you be interested in the Coupe.
For reference, I sold my 1999 Montreal Blue over Beige Z3 Coupe in August of 2008 with 122k miles, aftermarket exhaust, light weight flywheel, M5 clutch, Koni S/A suspension, tinted windows and E46 M3 17″ replica wheels for $12k.