Good luck with this difficult situation. Just to give you a little better idea of what you're up against right now, it appears there is substantial manufacturer to dealer incentive money right now that is allowing dealers to be able to sell brand new 2013 models for several thousand dollars below invoice. With the current E92 market conditions it is very likely someone can lease, or even purchase, a new 2013 for less than your current lease payment.
Present - '06 E90 330i sport; Past - '04 E46 ZHP, '00 E46 328i
www.bmwcca.org member #388003 - Use me as a referral & you could win a one day ///M Driving School!!