Wow, 600 episodes! I have the "Ultimate TV Westerns" set which has 150 episodes and another box set of westerns with 50 episodes. I also have the complete "Adventures of Sir Lancelot", and "The Buccaneers", which were produced by Hannah Weinstein, who was the producer of the Robin Hood series. Kind of an interesting factoid: Hannah Weinstein moved from Hollywood to Britain during the Mc Carthy era and hired blacklisted writers to write episodes of Robin Hood, which were then sent back to the USA.