BMW E30 M3 too mainstream for your tastes? Why not try one of its main competitors in DTM, the Mercedes-Benz 190E 2.5-16?
This particular one is an Evolution II model–No. 401 of 502 ever made–meaning it got more power, more aero and a more aggressive body kit than the previous version. The car is said to have originally been sold new in Japan and was imported into the U.S. sometime before 2017.
Currently showing 58,000 kilometers, or about 36,000 miles, the 190E reportedly received new fluids, a fan clutch and a thermostat in preparation for its sale.
Find this 1990 Mercedes-Benz 190E 2.5-16 Evolution II available from Bring a Trailer. Recent examples on Bring a Trailer have sold for as little as $180,000 and as much as $432,000.