I had an employee who once gave me the "On time, on budget, or buggy ... pick two" littany.
My reply was "You are asking me if I would prefer your project to be overbudget, late or defective. Should I be asking someone else to lead it?"
As to buying a used black F2 - stay away from anything with a lot of brassing or lots of baseplate scratches. These cameras were standard issue with the press and saw a lot of very hard use and not much love. Get a mint one, even if it means saving up for it; an F2 will last many lifetimes of tender use.