Pretty much any competent repair shop that's been serving the professional market for more than 25 years **should** be able to overhaul the body and at least clean the viewfinder. In their time, these cameras were, of course, very commonly used by professional photographers and tended to be serviced very regularly - and, as a result, pretty much any worthwile shop would have serviced many Nikon F2 in their day. However, many shops today will tell you they cannot be serviced any longer due to the non-availability of parts. Like any old camera, the non-existence of replacement parts is a potential problem.