The cost issue, the MONEY, has to be considered over the long haul if you actually plan on using it as a tool. I bought an ugly button rewind M2 body, already 14 years old when I got it in 1972. I knew the guy who'd bought it second hand to take to the 1968 Mexico City Olympics. I knew the UPI photographer who bought it from him. She used it at both the Republican and Democratic National Conventions in Miami Beach in 1972. I bought it from her as a back-up to my M3 and M4.
Even if I'd bought it brand new at the full list price of $200, a good hunk of change back then, it was a bargain. The memories of the people I've photographed, the places I've been, with that M2 are priceless to me.
Since I bought that M2 for $100 37 years ago it's had a couple of CLA's and M4 style synch contacts added, and I put on a new Cameraleather skin a few years ago.