Bought six books there today (cos no Book Swap, Scor!!!). I've generally found St Christopher's not very helpful when taking stuff but Mind have never been a problem. I have to declare an interest in Mind, however, they are letting my daughter do her D. of Edinburgh volunteer section there, and have been so sweet and helpful to her. In the past, I've found the charity shop (can't remember which one) in the Blue at Bermondsey the most helpful. There is a car park at the back of it and they've taken in a whole carload of sacks with deep thanks. If you have a lot, most of the mainstream charities will send a van round if you call them. I'm sure you could Google for the numbers.