The DVDs are really hard to come by over here in the United States.

I have been trying to buy seasons 1 & 2 on DVD for months now & the only ones I had been able to find on Amazon were the Australian version of the complete series, & the NTSC version of season 1 volume one, which only have like 5 episodes or something. I finally found the NTSC season 1 & 2 on BestBuy.com today for 17$ a piece. Pretty stoked! However even on that website they were listed as "unavailable" for months, & good luck finding them in a retail store over here.

I guess it just wasn't very popular over here.