I'd be very careful "buying" a used H-20/21 off of eBay. For one, as mentioned, most are actually leased units and the seller really has no business trying to sell them. There might be a few owned H-20's but not many. I happen to have two owned H-20's myself. One is active and the other is pretty much a "door stop". I bought the original H-20 two years ago from an authorized DirecTV Internet reseller and got it registered as owned. A couple of months ago DirecTV contacted me and said they'd discovered a defect in the model I had and that they were willing to replace it for free. Indeed, I got a refurbished H-20 and deactivated the other. I'd not try to sell the old one, and actually not sure I could anyhow, since DirecTV has it listed as a defective unit even though it was working perfectly when I pulled it down. My point is there might be somebody out there with one of these owned defective units trying to sell it and I'd stay away from that. As for Costco, good recommendation but our local store hasn't had anything but HR-21's for months so availability in some markets may be limited.