If you're an obsessive collector and/or completionist it's worth it...
It you're not, I guess it would really depend on your tastes in sci fi stories, in which case you should try to read a preview version first to see what you think first.
I'm the completionist type, so I would have bought it no matter what. Plus I managed to get it for pretty darn cheap so I can't complain (less than $9USD).