Find what all the local dealers are selling them for and start there. I now see them around $16500 after fees in some spots, other places 18K is the going rate. Have to use that as your base then drop maybe $1500 below that for being used and give it a shot. I am guessing you won't be charging sales tax so that will help you a little but. One of your draw backs is the dealer offers the full warranty and possible financing so that is worth something to a LOT of people. Plus it is an off road vehicle so a lot of people will feel it was run hard and put away wet so they are hesitant to buy used unless it is a good price.
thank you for the input - thinking I'll take a 7K bath & list for 13K - no taxes/street registered if anyones in the market - I'll post up a proper add later
I guess before I asked where you were located I could have looked at your signature! Wonder how it would work with you being in Washington quite a ways away from Illinios...