Yep, knew about it before I bought the old one.
Basically, the big difference between the two sets is a Bonus Disc, and a kickass box for all 4 DVD's. The new set is 3 disc, movies only, not individually packaged IIRC, and will retail for $25. I paid $15 for the OOP set, got all 3 movies, and a bonus disc that will never be available again, and was never sold seperately.