Was looking to rewatch Babylon 5 after seeing all the PR about Star Trek 50 and Deep Space Nine, and saw the boxset was £50. But you can buy the original individual season boxsets for £12.50 + £2.50 delivery from CEX. Bargain!
I know the big boxset includes a load of TV movies and that spin off series, but those aren't great so I just stuck to the core seasons.
Hope this is of some use to someone!