Something between 200 and 500$, though I pay in euro.
I don't buy movies, music or tv shows on iTunes, I can't see why on would do something like this. I don't like the thought that I don't physically own my stuff. I can add those physical items to my library any time I want and through iTunes Match have them everywhere I go.
The only things I buy on iTunes are apps, simply because there's no other way 😛
My navigation software ( which is one of the most important things a smartphone does, in my opinion ) alone costed 50 (70$). A few games and small apps like banking, tracking etc. did the rest 😛
But I got nevertheless most of my apps for free, for example promotions etc.
Regards