From the hobby perspective: Sure, some people have a hobby racing cars, which can easily get into the hundreds of thousands. But other hobbies, like fishing, can be dirt cheap. Comparing hobbies to values is not an even comparison.
Ah I see, I'm not looking for the actual hobby kits. But the reference books people buy to help them produce the miniatures accurately. Although I could start by googleing hobby kit reference books :D May be see if I can find a hobby kit forum and ask around. Thanks for the help!