You know, all these are 35 to 50 years old. Be certain to factor in a CLA to the price.
I like pre AI era Nikon bodies, there are no proprietary electronics to go bad and they are easily serviced. The same can be said of many 60s - 70s pro and advanced amateur grade SLRs, there have never been so many top quality bodies and lenses to choose from. IMO they're all bargains.