12.8 USD (18K CAD!) is still in the ballpark. the average price for all listed M52 coupes in the USA is currently $15,140.27 (13 available) There are cheaper ones, and there are more expensive ones. This one is listed manual so it's not a JDM import car like mine. I'd rather have a 3.0 for that price for a significantly easier S54 swap if the motor ever popped.
Having said that this ad is garbage. No mileage given, shitty pics.
Source:
Sale Listings || Z3 Coupe Buyers Guide