John has a pretty good "30,000 foot view" on how to go about this.
As for used..... Let's see, I flew from Atlanta GA to Ft Collins CO, loaded a machine into a Uhaul and drove 28 hours / 1600 miles home with a used machine.... Purchased it within 12 hours of the guy posting it. So yeah, for a new clean used machine..... 60% to 70% of what you have in it. I would have been willing to pay more if it had been within a couple of hours drive.