An old style Apple bluetooth keyboard (the full-sized one with the clear plastic casing) for £3 - works fine, a bit battered and needs a good clean.
A digital luggage scale, also £3
Six grapefruit glasses for £2 - unfortunately broke one on the way home, but since I don't actually eat grapefruit I mostly use them as small serving dishes for e.g. gherkins, nuts, etc. so I don't need a set.
A copy of Guy Boothby's A Bid for Fortune, the first Dr. Nikola book - crappy condition, cover unfortunately damaged and turns out to be the 4th edition, but at 50p I'm not complaining. It'll be a nice present for someone.
And The Republic of Thieves by Scott Lynch, the 3rd book in the Lies of Locke Lamora series, also 50p and in very good condition. One I've been meaning to buy for a while and never got around to, so very pleased.
So with £1 admission I think I got some pretty good stuff for a tenner, I'm very pleased.