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The four Terminator films being owned by different studios, it was long thought that they'd never be available in a boxed set. Fear not; Warner Brothers has taken care of that for you. This 5-disc set includes bonus features, deleted scenes, and the theatrical versions of each film--as well as two additional Judgment Day editions and the R-rated Director's Cut of Terminator Salvation.
$1.99 ships any size order from Family Video--and if you haven't heard of them before, they're a company you can trust. I've bought from them multiple times and have always been quite happy with all aspects of their products and their service.