I bought a Sat-Go from BestBuy a few years ago. A little pricey,but it includes a 17'' TV, sat dish, and a decoder for Direct-TV all in one package. Works on both 12V and 110. I have used it several times. You just have to have a fairly clear southern sky. You can see it on the Direct-TV web site.
No, I do not work for Direct-TV.