I bought the full collection of DVDs of B5 and it's spin offs in an Amazon sale a good few years ago, also in the same sale was Stargate SG1 so that in is the collection too, still to see the spin offs of that series, caught a few of SG Atlantis when I was back in the UK and have never seen any of the SG Universe series, I don't think it was ever broadcast here.
Currently I'm on series 10 of SG1 for the third time