You have to be careful with Amazon. They can be way over the top for supposedly new copies of old books. The price bears no relationship to the market it is a formula. This will turn up somewhere for the £20 quoted by Gary but you might have to wait a while. Remember too that this is just reproductions, at a much smaller size, of prints in the ILN. You could certainly get an original ILN full size volume for less than the new price quoted by Amazon.
Steve