Nikon normal lenses are incredibly inexpensive; the fact that bodies are worth next to nothing because they take film and were produced in huge quantities doesn't make the lens price any higher. And check prices on other good 50's, Nikon is toward the lower end of prices. As a matter of fact, I adapted my 55 Micro Nikkor to Sony Alpha because I would be unlikely to get more than $65 for it, while a Minolta or Sony macro would be several times as much.
You are paying less for a body and lens than ever before. Not much to worry about.