I made almost $5k off of my WRX STI lease. Lease was ending, and I noticed it retained value really well. Ended up buying out the lease, then trading in for $5k over what I owed. Had I sold it outright, I would have pocketed $6-7k. Don't expect to ever luck out like that with a Mustang.Leasing a car is not negotiable, you agree to their terms. Really the only way to make money is if the lender misjudges the residual value at the end.
Pluses for a lease is other than gas, oil, tires, filters and windshield wipers, the lender pays for maintenance. Minuses are restrictions on mileage and non negotiable terms. Another way to look at it, is if you’re planning on keeping the car longer than three years, it doesn’t make much sense.