In the case of my 'rent's Expedition, their prepaid 3 year lease was ~25K, and the buyout is ~29K. No way is a 2003 Expedition EB worth that much, so back it goes. Still, because they baby it, they were expecting to buy it out. But after having the first tranny go bad at 50K, and the rebuilt one showing the same symptoms just a couple of months later, they pick up their 4Runner next week.