I keep seeing people trying to sell Dish and DirecTV boxes that they have replaced. Are these of any value for FTA? And if so, any particular model to watch for? I'm off the grid, no landline, running mostly on 12 volts in my RV, which has a Winegard dish on the roof but nothing else for TV. I'm not interested in the majority of the junk on the satellites, and sure not interested in spending hundreds of dollars a year to see the couple of channels which would be worth watching. However, if I can put a $10 yard sale box on this dish and see (LEGAL) FTA, that would be worth a try.