I think that display would have had a years worth of use !! and it is not a million miles of the price of a new one, bearing in mind Sony was selling this TV at £2200 when it originally came out i don't think they are doing you much of a deal !!!
Save a bit longer and get a new one. or get a Samsung UE 46C8000 , fantastic TV, and can be had for about £1600 with a load of goodies thrown in.