There is a new python set coming out in Sept. The 16 ton Mega Set contains all 14 discs of the original Flying Circus TV show plus the two disc set titled Monty Python Live. I think the new package also contains some new artwork and the discs are packaged in slimcases rather than traditional DVD cases. Retail is 199.99 but most places are selling it for between $125 and $140.
Unless you really want the live discs or the slimmer packaging, the sam's deal seems pretty good to me.