Manual sedan (M3/4/5) rarity and growing collector preference

The four-door M3 sedan was only sold in the US for 1997-1998 with approximately 4,500-5,000 manual examples produced; commenters consistently call it stiffer than the coupe at the same weight, increasingly rare in the market, and undervalued—though the gap is closing, with manual sedans now outpacing automatic coupes.