Is that a display piece or what I dont think those models are coming now as they are discontinued. You should be able to get a good bargain if there is still stock... But why not go for recent models with Bravia Engine 3 and other latest features.
Well buying a display piece is has good as buying secondhand but with warranty this is 08 model .But at 20k its certainly better then the T550 or the current BX300.
In a blank screen put the backlight to max & see if there is any inconsistency ,whether you get a uniform blank screen.