There is one good thing about buying used, and it is the biggest one, IMO: The ability to pay completely for a rig immediately or within a couple of years leads to a great sense of financial freedom. When you have to pay monthly for years to own the rig, it could very well take away some of the enjoyment of "owning" it. Especially when you are a full-timer, it's nice to own your home outright, no matter what your economic situation will be in the future. You can't put a price on that sense of security.