A must-have if you're a Superman fan like myself. 8 Discs are as follows:
Disc 1: Superman: The Movie - Original Theatrical—First time in Hi-Def
Disc 2: Superman: The Movie - Expanded Edition
Disc 3: Superman II - Original Theatrical—First time in Hi-Def
Disc 4: Superman II - Donner Director's Cut
Disc 5: Superman III - Original Theatrical—First time in Hi-Def
Disc 6: Superman IV - Original Theatrical—First time in Hi-Def
Disc 7: Superman Returns
Disc 8: Additional Bonus Material
Free delivery as it is listed as an item over £25, but once you remove the VAT is ends up coming to £21.23 which came to $34.16 for me. I bought this a couple of days ago though, so the exchange rate has probably changed slightly, but still a bargain nonetheless.
It's been at that price for all of August, so will likely stay there - see http://www.blu-ray.com/movies/The-Superman-Motion-Picture-An… and click on the little graph icon near the price.
Having said that it's a good deal. Superman IV is a bit of a waste of time, but the quality of the other Christopher Reeve ones is pretty decent. It also has all the superman cartoons from the 1930's-40's, a few others like Bugs bunny and Daffy Duck parodies of Superman, and a black and white movie from the 1950's, among other things. I haven't watched nearly all the bonus features - there are heaps, though not all in HD.