Amazon.co.uk offers The Superman Motion Picture Anthology on Blu-ray Disc for $13.81 (£8.99). Add it to your cart and it drops to $11.51 (£7.49). With $4.73 (£3.08) for shipping, that's tied with our January mention as the lowest total price we've seen. (It's a current price low by $72.) This 8-disc set includes Superman: The Movie, Superman II, Superman III, Superman IV: The Quest For Peace, Superman Returns, and over 20 hours of bonus features.
This Blu-ray set is region-free, and the films themselves will play on US Blu-ray players, but note that the extras and special features may not.