Come on guys. someone must be able to offer up some advice..... This is an AV forum after all!!

Hi all Does anyone know of any retailers that operate a trade in on old equipment? When I say old equipment it is less than a year old. The reason is as follows: I currently have a Denon DVD 2900, a Denon AVR 3802 amp and Sky +. I have just purchased a Pioneer PDP 435 XDE Plasma. I have rung around ...