Services like Carvana , Vroom , or Webuyanycar specialize in "instant" offers.
You give them your old car as partial payment for a new one. It’s the most convenient option because they handle all the DMV paperwork and taxes.
This usually gets you the highest sale price because you aren't paying a middleman's markup.
These are everyday people (neighbors, friends, or strangers from online marketplaces) looking for a personal vehicle.