Not 55" mate. Once you go over the 50" mark, prices rocket.
How big is the 3dTV for a couple hundred more?
I know what you're saying about depreciation, this TV was over 3k when new. However, comparing it to current cheaper sets such as the big sammys or LG, this set still outperforms them.
I know you can get smaller sets with higher spec than this, but to most blokes, size matters . Trust me, this is one hell of a TV for £700, if I didn't already have the same set myself, I'd be having it.
My dad is desperate to get his new 60" Sony, so make a sensible offer, he may well accept it. He doesn't need the money, he just wants the set gone to make room for his big new one.