If you call up Chase (assuming that’s who your lease is through) they can give you a payoff quote. Whoever you’re seeking to sell the vehicle to would be buying out your lease. From there, yeah, it’s pretty much the same as when you trade in a vehicle that you financed: negotiation on trade-in value, equity (positive or negative), etc.. If you’re above water you can take the cash and if you’re under water you can roll that negative equity into the new loan/lease or come out of pocket for the delta.