Amazon have the BFI's
Legend of the Witches at £8.99.
https://www.amazon.co.uk/Legend-Witc...7W6C8YDV&psc=1
It's out of stock but you can still order it at that price.
Looks like quite a few BFI releases are that £8-9 price including
Symptoms, Cosh Boy, Requiem for a Village, That Kind of Girl, The Orchard End Murder... even my just reviewed
Eye of the Needle.