I currently have a Dillon 550 that I bought new two years ago. I'm thinking about purchasing the 650 as a replacement-upgrade. I am only reloading 9 mm on this machine. The main reason I wish to purchase it is to automate some of the functionality in order to remove errors such as double charging or a missed charge. Also a little extra speed would be fine. One of my concerns is that the 550 will be put back in its original shipping box and probably may not be used. I am wondering how easy it would be to sell my 550.