I learned of this site in the BMW CCA news blast today. Several E46 M3s, but no ZHPs currently:
https://www.pcarmarket.com/search/?page=1&q=bmw
2006 330ci ZHP - Silbergrau Metallic / Stoff Laser/Anthrazit / Alu Black Cube trim / Adaptive Xenon headlights / HK hi-fi system / heated front seats
Yes, I’ve been trolling this site for a few weeks now.
Also https://carsandbids.com/