If you need some extra room on your shelves then you can sell your old CD's DVD's and games at http://www.musicmagpie.co.uk. Easier than listing on E-bay or Amazon (although you may get less money in the end) you enter the barcode on the packaging and a price they will pay you comes up on screen. They even give you a FREEPOST label to send the stuff to them. I listed some items that didn't shift at the car boot - the minimum was 30p each.
One box down and £7.12 back (reviews say they do pay up but it takes a while).
Right, off to find more boxes to fill...
Savings to date = £497.73 + 7.12 = £504.85