Although I have both KN5000 and KN7000, I have only always used my KN5000. I have brought out the KN7000 from its flight case less than three times in total. It is very prestine-looking - still brand new with no problems or scratches whatsoever. I'd like to sell it or trade it in for Tyros4. I wish to sell it to someone who'd have a better use of it. Alternatively, if there is someone who has Tyros4 and needs KN7000, I will be interested in a trade-in.