These are really three different products dressed up as the same decision. Two of them buy your car directly and compete for it. The third turns you into the salesperson. Which "wins" depends entirely on how you weigh money against time — so start by understanding what each one actually is.
What each option really is
Carvana is an online instant-buyer. Enter your VIN or plate, get a firm cash offer in minutes, and they'll pick the car up from your driveway. Zero human contact, fast payment, and an offer that's usually valid for a few days.
CarMax gives you an online estimate too, but wants you to bring the car in for a quick appraisal to firm it up. Also fast, also no-haggle, with physical locations if you'd rather do it in person.
A private sale means you list the car yourself, field messages, meet strangers, and negotiate. More work, more risk — and typically the highest number, because you're selling straight to the person who'll actually drive it, with no middleman's margin baked in.
The real spread
Here's the pattern that holds across most mainstream cars: Carvana and CarMax land within a few hundred dollars of each other, because they're both instant-buyers competing for the same inventory and pricing off the same wholesale data. Which one edges ahead is car-specific and changes week to week — the only way to know is to get both numbers.
Instant-buyers (Carvana ≈ CarMax) < Private sale — usually by four figures on a popular, clean, in-demand car
The gap between the instant-buyers and a private sale is where the real money sits. That spread is widest on desirable, well-kept, in-demand vehicles and narrows on older or higher-mileage cars a dealer would just wholesale anyway. On a clean, popular car, private sale can beat both instant offers by four figures — that difference is the "convenience tax" you pay for skipping the work.
What the instant offer really is: a floor, not a ceiling
The critical thing to understand about a Carvana or CarMax number is that it's an opening bid from the buyer. They profit by buying low and reselling higher, so their offer is the lowest end of what your car is worth — a floor. Treating that number as "the value" is exactly how sellers leave money behind. It's a great floor to have. It should not be your finish line.
So which should you pick?
Pick an instant-buyer if speed and certainty matter most — you need the car gone this week, you don't want strangers at your house, and you'll happily trade a few hundred (or a few thousand) dollars for zero hassle.
Pick a private sale if you have the time, patience, and stomach for it, and squeezing out the last dollar is worth several evenings of messages and meetups.
But that's a false choice, and it's the reason most people settle. The actual goal is private-sale money with instant-offer ease — and that's a job you can hand off.
The third path: make them compete
You don't have to choose between the easy-but-low route and the high-but-exhausting one. Get your instant offers as a floor, then make buyers bid above it. That's exactly what an AI deal-broker does: it takes your instant offer as the starting line, works multiple buyers — dealers and instant-buyers — against each other, and hands you a ranked list of real offers to pick from. You get the private-sale upside without becoming the salesperson. Start with a firm instant estimate so you know your floor going in.
See if 8 buyers will beat your instant offer
Five questions, a firm instant offer, then an agent that works Carvana, CarMax and dealers against each other. Free, no obligation.
The short version
Carvana and CarMax pay about the same — fast, easy, and low, because they're the buyer. A private sale pays more but costs you real time and risk. The instant offer is your floor, not your value. The smart move is to get that floor, then make buyers compete above it — private-sale money without the private-sale weekend.
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