HI... new to the site. This question has probably cropped up before but I am a Direct TV user, and have been for some time without changing any equipment. Have currently 2 Mini Genie C41-700's hook up into my system and would like to add a 3rd one. My, how things have changed with Direct TV. They want me to now BUY one for $99 when they used to just send you one and charge you a user fee each month! I see I can buy a unit on Ebay for much less but can I purchase one on Ebay and activate it using Direct TV's online site without them somehow having a cow and blocking the signal?