They're expensive, aren't they?
Jerry Smith has an excellent reputation so you should be all set for a while now.
Why go for an M2? More maintenance expense... I decided to go for an M6TTL for my first Leica 'cos it was only a couple of years old so I figured it won't need a repair for many years. Also I bought it from a very reputable dealer who gave a very generous warranty on it, even though it was used.