Layton Cycle in Layton Utah has a 15 600 RMK 144 with electric start for $7,200.00. I bet they would take less than that now since the sled season in Utah is about done. The salesman told me he wants it gone bad. I was going to buy it for my wife but she didn't like the color scheme.
I know you're looking for a 2014 or 2015 but im attaching a link for one in Bend OR. Only 100 miles and under $6000. It's been for sale since fall. Might be worth looking into