To get an offer for your car, bring it to CarMax and our Buyers will appraise your vehicle. We'll give you a free written offer good for 7 days, and we'll buy your car whether you buy one from us or not.
If you want a basic estimate, a website like Kelley Blue Book can give you a ballpark figure. Just remember, no one can give you an offer for your car without carefully inspecting it, especially since vehicle values are changing so rapidly these days.