I love the series but already own first 4 seasons and have been waiting YEARS for rest of series.  Now they only offer as full set.  I will not be buying the full set to get only the last two seasons.  I hope no one buys it so that the company gets the message that this is an unfair practice.  Makes me not want to order any more season sets of any show because they release a few to get us hooked then expect us to buy the whole series.  Kind of the same thing with Diagnosis Murder.  I guess it's bad form now to buy individual seasons and better to just wait until series has run it's course and wait for a "whole series" release.  I'm tired of getting burned by buying early seasons only to be duped in the end when the final season are not individually released.  We need to send a message to the people making these DVD sets.