And there's plenty of people into cars that would do just that ...
The other thing to remember is that for most of us a collection like DJ's is collected over a long period of time.
For the sake of argument, lets imagine that once you leave school and start working that you can save €500 per year to spend on models - thats not a small sum of money, but thats not a crazy amount either ... now imagine how big your collection will be once you reach DJ's age!