I would have to say they would range around $200 and up. These TVs are pretty good and good quality and I have a few Samsung's as well they have been pretty good for me and my family. I believe my son has one in his room and it is an older model which has worked now for years.
That large of a tv will cost you around 1 thousand dollars, and that is not including high definition. If you want a full high definition tv it will cost you an additional grand.
Depending where you go and what kind of TV you're looking for in terms of picture quality, a Samsung TV of that size will cost between $700 and $1,500.
A Samsung 56 tv will cost a few thousand dollars. A television that size is quite large and in comparison to a mini-move screen. Samsung is a brandname.