Where can I buy West Wing to watch on a mobile device?

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I have an Android tablet. I'm pretty annoyed in that I spent nearly 200 dollars buying all the DVDs and it seems I have to buy it online all over again if I want to watch it while out. I love having DVDs but I travel a lot and I don't think it's fair that I pay for it twice just to get it on a different device.

So I don't want to spend a lot of money... in all honesty I think it'd be fairer to me as a consumer if I downloaded it for free. But I can't find anywhere to do that. Where can I get it CHEAP? Amazon has it for like 35 bucks a season and there's no chance in hell I'm paying that. iTunes was much more reasonably priced at 18 dollars a season but as I said I have an Android tablet and last time I bought something on iTunes I wasn't able to put it on my device which made me very angry, especially as it took three days to download.

Any way I can avoid being TOTALLY ripped off left, right and center? Or is there any way I can play iTunes content on Android? I can't even get to the raw file on the other one I bought.