We changed our TV transmitting signal in NZ from analogue to digital a couple of years ago.



That created a bit of a watershed situation where newish flat screens suddenly became 'Old flatscreens', you can still use them with DVD's and such, but you need a set top box that sends the new TV signal to the flat screen.

That and the fact because of 'Bad capactors' and that the screens don't take much (or any) punishment without breaking, has kept the second hand values for flat screens up at about 1/3 or just under 1/2 new price.
Even plasmas have value, easy to sell them.