The problem with lease buyouts on things like Volvos is that (A) for short term ownership eating all that TTL is painful, while (B) they are not really good candidates for long term ownership due to below-average reliability and high warranty prices.
I would maximize/find the highest bid. Not just Carvana (see below). Then try to find a Toyota, Hyundai or Kia dealer to match that on a trade-in towards a PHEV like a RAV4, Sorento, SANTA FE, etc. Use the equity towards a down payment on financing and the trade reduces your tax bill on the new car. Reduce your gas consumption and future maintenance costs in one go. Extend the OEM warranty as far as it goes (8 yrs on Toyota and 10 on Hyundai/Kia AFAIK), and own it long term, that’s the most financially responsible thing you can do IMO.