Yes they are negotiable ..... the dealer would much sooner make a sale than get a car back. It will likely go to auction anyway.
What is the KBB for your car?
14K ... did you drive around the block once a week or what!?
2011 BMW 335i E92 - Le Mans Blue, 6MT, M Sport. JRZ RS Pro, Quaife LSD, BMW Perf Exhaust