I hope Amazon will bring the price of this Steelbook Release down to a more reasonable £17-99, between now and the film's eventual release at the end of September. £23-50 is very pricey, even for a new Steelbook film!
just get your pre-order in and you'll pay the lowest price from now till release. And they don't take the money until it's dispatched. As I type this it's down to 19.85. I suspect it might drop a bit lower now and then, so get your order in.