How much to offer on 2016 Rubicon

My dealer is out of 2015 Rubicon FA6 but has a $9100ish 2016 model…they give their discount in addition to the $250 Honda discount and he quoted me $8100…then he said all the fees put it at about $8500 BEFORE taxes…any idea what I should offer or try to negotiate? Those $400 in fees are so aggrevating.