The three numbers that define your car's worth
Almost every valuation you'll ever see — from a dealer, an insurer, or an online tool — is built on three figures:
- Trade value — roughly what a dealer will pay you for the car. This is the lowest of the three, because the dealer still has to recondition it, carry it on the floor, and make a margin when it resells.
- Retail value — roughly what a dealer would sell that same car for. The highest of the three, and what you'd pay to buy an equivalent car from a reputable dealer.
- Market value — sits between the two, and is the figure closest to what a private, arm's-length sale between two individuals should realistically achieve.
Why the trade-in offer is always lower
A dealer's trade offer has to cover reconditioning costs, the risk of the car sitting unsold on the floor, and their margin on the eventual resale. That's the entire reason the "trade" and "retail" terms exist in the first place — they describe two different sides of the same transaction, with the dealer absorbing the work and risk in between.
What a private sale actually nets you, once you subtract the hidden costs
The headline private-sale price looks better on paper. It rarely stays that far ahead once you account for what selling privately actually costs you:
- Time. Photos, ads, viewings, no-shows, and negotiating with people who don't show up — private sales commonly take weeks to months, not days.
- Fraud and safety risk. Strangers test-driving your car, EFT reversal scams, and fake proof-of-payment screenshots are real and common. See our top 5 used car scams guide.
- Double running costs. If you buy your next car before the old one sells, you're carrying two instalments and two insurance premiums for however long that overlap lasts.
- Reconditioning and roadworthy costs. Making a car presentable and legally sellable costs money you don't spend when trading in as-is.
A worked example
Say your car's realistic private-sale price is R180,000, and a dealer's trade-in offer is R155,000 — a R25,000 gap on paper. Now subtract two months of carrying costs while you wait for a buyer (say R14,000 in instalments and insurance) and R3,000 for roadworthy and detailing to make it presentable. Your real net from the private sale is closer to R163,000 — a gap of R8,000, not R25,000. Whether that R8,000 is worth the extra time, risk and hassle is a genuinely personal call, not an obvious one.
When trade-in wins, when private sale wins
- Trade-in tends to win when: you need certainty and speed, you're buying your next car at the same time, the car has outstanding finance the dealer can settle directly, or the model has weak private-sale demand.
- Private sale tends to win when: the car is a popular model in strong demand, you have time to wait for the right buyer, and you're comfortable managing the paperwork and safety precautions yourself.
How to get a fair number before you decide
- Check live comparable listings for the same make, model, year and mileage on AutoTrader, Facebook Marketplace and Gumtree — this tells you what buyers are actually paying right now, not a theoretical book value.
- Get more than one trade-in or instant-offer quote — a dealer, an instant car-buying service, and one more if possible. See our full comparison of selling routes.
- Use a recognised trade/retail data reference as a sanity check alongside the live listings, rather than relying on either source alone.
- Factor in your own realistic timeline and risk tolerance — the "best" number on paper isn't always the best deal once time and hassle are priced in.
Bottom line
Don't compare a dealer's trade-in offer to your private-sale asking price — compare it to your realistic private-sale net, after time, risk and reconditioning costs. That's the only fair comparison, and it usually closes the gap by more than people expect.
Selling your car? Get the right guide for your situation.
Our tier guides cover selling private sale vs dealer for every vehicle age bracket — negotiation tactics included.