I dont think anyone uses Full motion 737 for MCC courses, other then not being necessary it would cost way more the 5€K.
MCC is just that, not a type rating, therefore you only learn stuff about crew corporation so a simple sim will do the job.
Granted, if you do it on the 737 sim you will obtain some basic knowledge about the aircraft and its cockpit setup, but really if you want, you can do that from the books and the cockpit posters. Save your money, my 2 pence