I picked up an 'I am the Law' T-shirt in Camden market a couple of years ago, have worn it maybe twice.
Would anyone like it for £5 + postage?
It's identical to the one at this site: http://www.ukrockshop.com/acatalog/anthrax_t_shirts.html (http://www.ukrockshop.com/acatalog/anthrax_t_shirts.html) and is size large.
Right, then, Oxfam it is!