Saw this in the Sun newspaper.
Traded mine in tonight! There were other games in the £20 trade in offer but this was by far the best offer as, quite frankly, Mario Party 8 is very poor. Others I can remember were Mario Galaxy and Mario Kart...If anyone can add to that list please free to add a comment. Thanks!
Sorry if it has been posted.
Copy of delktaylor's post below for ease of reference...
In yesterday's Sun newspaper the trade-in games were
Hary Potter (The Hot Blood Prince),
Super Mario Galaxy,
Pokemon Battle Revolution,
Animal Crossing City Lets Got to the City
Mario Party 8.