The Book People have the Brian Jacques Redwall set of 10 for only £3.00.
I bought this set at £9.99 a month or two back and it was a bargain then and it will make a great present for next Christmas or a birthday. Individual books are £5.99 each.
I've used the Book People several times now and the service is excellent with fast delivery.
Don't forget Quidco as well!