Amazon currently has the Limited Collector's Edition 4-disc box set on sale for $44.99. That's less than half the list price.
Regarding the talk about 4K in the home, I have attitude "bring it on!" Sure, there may be diminishing returns in putting 4K native resolution into anything smaller than a 50" or 60" TV monitor. But if 4K becomes commonplace in higher end consumer electronics it will probably be the thing that finally gets movie production and more commercial cinemas to move above the still de facto 2K standard. Some movies are produced in 4K, but the vast majority are still done only in 2K. If 4K is available in the home the people bankrolling the movie productions will feel better about rendering a movie in 4K rather than saving money by rendering 4 times faster in 2K.
I've had it with 2K in commercial movie theaters. 2K (or "1080p") is fine on most living room TV sets. 2K is pretty lousy on anything larger than a medium sized cinema screen. 2K really suffers on giant sized screens. If the projection setup (projector, lens, alignment to screen, etc.) is top notch you're going to see the pixel grid pretty obviously on a giant sized screen. To compensate for this problem some theaters show the image a little out of focus. Image blurring is really one of the functions of the dual projector setup in IMAX branded digital theaters (brighter 3D is the main function).
With film projection there was nothing wrong with getting the focus dialed in as well as possible. If you could see the grain structure from the film print swimming around on the screen you knew the projection was properly in focus. I look at things like end titles in d-cinema theaters and the type is all soft looking. I rent the same movie on Blu-ray a few months later and the same lettering has clean, sharp edge detail on my TV screen.
4K projection technology for movie theaters needs some improvement. The biggest complaint is most 4K projector models don't throw all that bright of an image. Some have design flaws, like how Sony implements RealD on its 4K projectors (too many theaters leave the RealD filter in place even when they're showing a 2D movie). IMAX is working on their laser-based projection system, which is reportedly 4K in resolution. Other companies are working on competing laser based designs. Hopefully these new projection designs will support 4K resolution 3D. Right now all movies in 3D are only 2K.
Eventually all commercial cinemas will be running 4K-based projectors. A 35mm film projector could put in 2 or 3 decades of service pretty easily if it was properly maintained. A commercial movie theater would be doing pretty good to get 10 years of life out of a digital projector. Many DCI-compliant 2K projectors currently in service are several years old now.
As this cycle of changing out digital-based equipment continues, I'd like to see something done to treat 'scope material properly in the commercial cinema -namely a true anamorphic based setup that makes 'scope the biggest format. Right now the flat format yields a significantly higher resolution image. 'Scope is just cropping into it.