I love you Galloway and Porter!
I went to my first sale last Saturday and ended up with 10 brand new books for £13. The Harry Potters were £2 each but all other books were £1. I have enough reading material to last me a lifetime (well I am quite lazy at getting round to reading). I utterly recommend this place to anyone who likes reading lots. I'm just hoping they do an academic sale soon, cos I neeeed teaching books.
http://www.gallowayandporter.co.uk/warehouse.html
Looks like I'm going to the next general sale anyway!