I have seen people trying to sell their leases before in newspapers in the classified section. I presume you can do it free and clear to remove yourself from any liability. Of course the lease-lender would have to approve that based on the buyer's credit and what not. That's a hassel and perhaps can't even be done in which case you would be liable (in which case obviously you would never do that).
I have seen people trying to get rid of their leases in newspapers though.
Basically it's a huge hassel - why do you want to get rid of this lease? In the future leasing = bad with damn near no flexbility!