What if CarMax's offer is less than my lease buyout price?

If CarMax's appraisal comes in below your lease buyout price, the difference is negative equity. CarMax says you can pay CarMax the difference directly, and its offers are valid for 7 days to give you time to gather the funds. Your other options are to get quotes from other buyers like Carvana or a local dealer, or simply return the car at lease end. Do not assume one offer reflects the market; getting three quotes is always worth the time.