RPG stuff in Oxfam shop

The Oxfam book shop in Portobello Road, London, has a lot of RPG material at present - GURPS 2nd edition modules, the Exalted RPG, Traveller modules, some Call of Cthulhu, etc., in a box near the door. Cost seems to be £3.99 or £4.99 for all of the books I looked at. Condition varies from pretty good to well used.