Oh, that's unfortunate :/ I mean obviously there are more important things to have than a tv show so I shouldn't try to talk you into a buy like that, especially if you haven't seen any of it yet so who knows if you'd even like it - it would kinda suck to spend that much on a whole show and end up not even watching it to the end :P then again it is definitely one of the most appreciated scifi shows so chances are you'd love it like most others. Tricky question!

Or you could ask around if any of your friends have it on dvd - I'm always lending scifi to and from a few people :D I guess the other option is just to hope it'll air again in your country soon enough, I was lucky and it happened to be on air just as I became interested in it in the first place. (But then I got impatient at the 'one ep/week' speed and had to buy the seasons :p)