I passed on a super nice one this year for $750 or $800. Game just didn't do it for me. It was just too much like too many other machines. If I was selling one and could get $1000 or more for it I would be very happy.
With that said - I guess price just depends on how bad you want to sell something and how bad someone else wants it. But if I was in your shoes I wouldn't hold out for anything near $1500 if I really wanted to sell it.