I would ask around the place you live for a recommended dealer! Talk to friends or other riders in your area. Not sure what your mechanical ability is but all the older sleds have issues. I love my M8 but i'm also not afraid to tear it apart in the summer to make sure everything is in great shape for the season. If your not that into working on your own stuff a great dealer can make or break your season!
My mechanical ability is pretty good, but at the same time I don't want to be working on my sled as much as I am riding it.
I like the idea of possibly new/used/leftover for a few grand more and getting a warranty with it. I think I am learning towards that right now, unless a deal jumps at me that I can't pass up.