Early listings from a newly introduced model could be a salesman who decided they just didn't want to sell them, or as many, "buyer's remorse" after the sale. It usually doesn't take too long to see them pop up here and there. I've already seen the new Aerus Guardian Platinum on ebay a couple of times, one currently listed. Sentria II's are currently averaging 450.00 with everything on ebay. It's the people that paid upward of 1500.00+ and aren't happy that I feel sorry for, they will never get their money back, kind of like a car when you drive it off the lot.