Just use a broker, there are plenty in your region offering volvos. Take your equity as a check, not roll it into the next lease. You don’t HAVE to sell your current vehicle to the dealer facilitating the next deal. What folks are trying to tell you is get quotes from multiple online entities.
Please look here for brokers. All are reputable and legit:
This thread will show you the numerous places to value your current car:
https://forum.leasehackr.com/t/list-of-places-to-sell-or-value-your-car-online/396451/146
3rd: READ READ READ. Learn how leases and the calculator works. This has been said numerous times.