The MS 34s were nice boats in their day. But they are now 30-40 years old. Take a look at the rot porn thread. Many of these pics were from MS 34s. Virtually all have some rot, and leaking windows.
Unless you do the rot work yourself, you can never recoup the boatyard costs of repairing it.
But the basic design was great and the Perkins 165 installed in most is a solid engine. If you could find a rot free or almost rot free boat with a solid engine, then jump on it.
FWIW the MII has little or no boat deck overhanging the cockpit. I much prefer the MI for that feature, but that does steer you to older boats. Not sure if it matters whether the boat is 30 or 40 years old though.
David