i'm not normally one to point out epic deals, but this one deservs to be spread everywhere.
you get GTA1, GTA2, GTA3, GTA4, GTA vice city, GTA san andreas and GTA liberty city stories for £4.99
link here: http://store.steampowered.com/agecheck/sub/4466
ends october 24th
apparently this is celebrating the 10th anniversary of GTA3, so its not a misprice as i first suspected