If you are fan of these movies then it is a good deal as it is currently at half price in iTunes.
Also it's prequel (in book world) but sequel in movie world The Hobbit trilogy (https://itunes.apple.com/au/movie-collection/the-hobbit-tril...) is also at the half price.
I don't know the end date of this deal, if someone knows then please write here.
Microsoft Store - 49.99$ (https://www.microsoft.com/en-us/p/the-lord-of-the-rings-tril...) I think that AU website
Google https://play.google.com/store/movies/details/The_Lord_Of_The... is not showing price now to me (probably because I am not logged in to Google) but I think it was about 40$ something