Wow, these discs just keep getting cheaper and cheaper. Two years, two months and a few weeks ago, I picked up the then-new two-disc Star Trek: The Motion Picture set for about CDN$32, after tax. Since then, Paramount has been re-issuing the subsequent Star Trek films as two-disc sets packed with extras, at a pace of one every several months, and today, I picked up the two-disc Star Trek VI: The Undiscovered Country set for about CDN$16.
First, I must gripe about the packaging. All the other films were released in black plastic cases, and indeed, if you get the new six-movie original-cast boxed set, all the discs come in black plastic cases. But if you buy ST6:TUC on its own, it comes in a white plastic case. Huh? Second, there is no booklet, at least not in my copy. Third, they are less than forthright about the fact that this film has been tweaked since the last time it was released.