You can sell out the lease absolutely.
I am excited about this thread, as this is my specialty.
You need to find a leftover 2004 model of whatever brand, with lots of rebates and incentives. You can do research on that over at
www.edmunds.com
Essentially, you need to trade the car in to a dealer... depending on your state you may get a break on the tax based on the difference.
Then you negotiate the selling price of the new car down to invoice less incentives and rebates. Ideally you need to find a car with 5,000 to 10,000 in rebates.
Most manufacturers banks buy up to 120% of MSRP, so if you are at invoice less 10,000 that gives you close to $12-$14000 in play room to eat up that negative on your current car.
As long as your credit is good, you can make it work.
Just make sure you get GAP coverage on the new car, either through the dealer or the insurance company. That way, if you wreck the new car, all of the negative you roll in will get eaten up.
That is the only solution that you have, unless you want to sell it and pay the bank in cash for the difference.
PM me if you have any other questions.