I just purchased a used, but mint condition 2013 3010 DS. Upgrades included 4 tv's, upgraded stereo system (XM Sat), wheel and RV covers, Stabilizer bar, and more. Purchased from a Retired Air Force Master Sergeant who was a vehicle and aircraft mechanic and had kept the rig in absolutely near-new condition.
23,500 miles, new tires all around, and a 2-wheel car trailer.
He originally asked for $60,000, then dropped to $56,000, and when my wife and I got involved, we ended up settling at $52,000 cash.
The NADA range for the rig we bought with the upgrades and accessories was listed at $61,870 for the LOW, and $ 74,555 for the HIGH.
We had the additional fortune of being Active Duty Military. (My wife is a Colonel in the Air Force) and stationed in Oklahoma at the moment. Oklahoma does not assess sales tax for military purchasers of vehicles if the rig will be titled and registered out of the State. Additionally, as Florida residents, we are exempt from paying Florida Vehicle Sales Tax as military, because we are currently stationed out of Florida and agree to not bring the newly registered vehicle into the State for six months. That ended up saving us over $3500 in taxes! Woohoo!
Good luck with your sale. We love the new rig!