Does any one know how well the process of buying your own HD rcvr from ebay or elsewhere works. Does dish charge you to send back the rcvr i am replacing(not hd). They want a 100.00 bucks to upgrade from SD rcvr to HD rcvr so i though it may be worth my time just to buy one i already rent 2 HD boxes from them already. Also could i purchase another HD dvr rcvr,will it work without them coming out just by activating it? The rep on the phone told me i couldn't rent another dvr rcvr but i like the 622 i have now Thanks for the info