Should I trade-in my '22 Volvo Polestar on a new lease, or sell it myself? Any rule of thumb?

On your own meaning private party? My personal rule of thumb FWIW: private party is great for cars with title in hand, and fair value is in the mid $20s or below (higher than that most people just don’t have the cash).

Obvious exceptions are cars with some sort of speciality or X factor to it, the kind you’d find on BaT or C&B.

Otherwise just take the best bid from