You said : "It's a shame the set with the other Marx Brothers films is so expensive."
Well said sir!....
In May 2009, I purchased both Marx Brothers boxed sets together from http://amazon.co.uk. The total cost including shipping to Australia was £30.03, UK pounds. The eight movie boxed set currently under review here, cost me £13.98. The "other Marx Brothers" boxed set only cost me £10.98!!! Basically, a real amazon bargain. So it is absolutely disgusting to see the ludicrous prices that some money grabbing merchants are trying to procure from the sale of new and used copies of "the other" set. Actually, you are better off buying the US version of "the other" boxed set which although is also a bit pricey, is still selling for a good deal less than the UK version. The downsides however are that 1. The NTSC region 1 discs will only play in region free / multi-region DVD players and 2. You get a bonus movie which is also in the other eight movie set. So check out the US version of "the other" boxed set at http://amazon.co.uk. Alternatively, try amazon.com where amazon are currently still selling new copies of 'the other' set.
Marx Brothers Collection [DVD] [Region 1] [US Import] [NTSC]