Noticed this in Ilford yesterday, seemed like an OK deal if you got one of these games lying around and don't play them anymore.
Gamestation were offering HG/SS for £14.99 if you traded in one of the following; Mario Kart, Animal Crossing, NEW Super Mario Bros., Zelda (not sure which one) or Pokemon Platinum. (All DS)
Unsure if this is store specific or nationwide, would appreciate it if someone can confirm.
Was slapped on huge posters in shop window and in-store.