Have just read the following on Eurogamerhttp://www.eurogamer.net/articles/2010-11-26-game-offers-extra-20-percent-console-trade-in
Shops GAME and Gamestation are offering an extra 20 per cent trade-in value on all hardware.
The offer, which launches today, is designed to encourage gamers to trade-in their unwanted consoles in time for the Christmas spending splurge.
The shop offers this example: trade in a 160GB PS3 Slim and, rather than receive £150, you'll get £180.
This of course relates to in-store credit – you won't be walking out of the shop with your wallet bulging with cash.
The fun ends on Thursday 9th December.
Follow the link above for a table of the old and new values for each console.
I don't know how their values compare to others, but thought it was worth sharing