Should I buy or turn in my BMW lease with only 11,000 miles on it?

Just FYI, this is not nearly as easy as it would seem to be at first glance (at least in CA). IMO, it’s actually not possible to sell the car to Carvana/Vroom/etc. because of the requirements for the sales tax exemption. This thread is a good rundown of how it works. Third Party Lease Buyout