How much you’ve paid into it over the course of the lease is completely unrelated to how much equity you may have.
You need to get offers from all the usual sources to get a ballpark. Compare the offers to your payoff to gauge potential equity.
In CA you can buy the car yourself then sell it within 10 days to avoid paying tax. Otherwise you can sell it directly to an Audi/VW dealer to avoid that hassle. You can technically sell it to any dealer but 3rd party dealers may have a much higher payoff.
