Bought 2 used 2011 stock nytro's in November, 1 with 200 miles and 1 with 500. My brother has 4 2008's, but suspension is noted as very poor in 08 and 09s. Was sold on motor and reliability=several years worth of fun and no trouble shooting on vacation or way off the beaten path. E-start and just fuel and go have been great. Heavy front end wants to steer down and away on side hill. But rode deep snow in targhee NF (squirrel meadows) over New Years and not stuck once (high alpine meadows). Sled becomes very responsive with weight shift in untracked snow; I'm 235. Rode up and down mtn terrain in N Idaho recently and confidence grew throughout day in 2-3 ft. of fresh. Adding OFT relocator, rollover valve, lefty throttle, and probably a riser. Will do a +3 A Arm kit on 1 sled and see if turns easier on sidehills. Still, sleds were like brand new and got 2 for same coin as a new stock sled. Have been very happy and really can't lose much in value on them now. Figured if needed light 2 stroke could buy down the road these would be great family/trail sleds (married, 2 kids means time together).
Found the best deals on my nytro's in Seattle area (could have been coincidence, but wondered about heavier wet snow (cascade concrete they sometimes call it) vs Rockies. Meaning weight and tough steering compounded in those conditions.
Also bought a CRF 450 with Mtn. Horse kit in case not getting enough deep tree bushwhacking with the nytro's, but that's a totally different question from what you asked. In time, these should get more affordable (used) as well. Don't want to make waves with other readers, but many say will go places sleds won't, or would be sketchy on a sled (i.e. Really tight areas).
Research pays; good job looking and asking others!