The 6-speed manual is rarer and commands a clear premium over DCT, with commenters framing manual cars as where the major value increase and collectibility lie.
6-speed manual vs DCT value premium
BMW E9x M3 (E90/E92/E93, 2008-2013) · variant
The 6-speed manual is rarer and commands a clear premium over DCT, with commenters framing manual cars as where the major value increase and collectibility lie.