How do I Get a Good Deal on a Used Car?
If I had a dollar for every time I was asked that, I would be very, very wealthy.
We can (and do) give many practical tips, but first I want to address the answer at a high level. Let’s first define terms. A “good deal” is best defined as the biggest available difference between a car’s “value” – what it’s worth – and a car’s “price” – what it costs. Let’s look at an example (with fake numbers):
A 2008 Honda Accord with a Base Trim (ex: LX) and no Options (i.e. no leather, navigation, 4×4, etc.)
Value = $15,000
Price = $14,500
A 2008 Honda Accord with a Premium Trim (ex: EX) and Fully Loaded (i.e. has leather, navigation, 4×4, etc.)
Value = $18,000
Price = $16,000
Which is the better “deal”? Though the Accord with the base trim is cheaper, the one with the premium trim is a better deal because the price represents a bigger discount from the value.
Alright, so now to answer the question. The short answer is that you compare the price and value of every car for sale that meets your requirements and the “best deal” is the one with the biggest difference. Sounds simple enough, right? Well, not exactly. There are very few published prices for cars online today. Wait, but I can get hundreds of prices on Autotrader.com and cars.com! True, but the majority of those prices don’t represent the price you could actually pay. Sometimes the price you see online requires you to finance through the dealer (do not do this if it’s required!) or more often, the price online isn’t actually the lowest price the dealer will sell the car to you for. When comparing price and value, which do you want – the advertised asking price or the post-negotiation price? That’s right – the post-negotiation price. This is the reason research alone will never produce the “best deal.” Because research doesn’t get you to post-negotiation prices.
Value is equally hard to discern. Is it Kelley Blue Book, or Edmund’s, or NADA? None of them, unfortunately. They make (valiant) attempts at estimating value, but there simply is no measure out there today dynamic and accurate enough to use for value. However, here’s the good news. Since we’re looking at the discount off the “value,” whether or not the value itself is accurate or not is unimportant, as long as the value is similarly inaccurate for all cars I’m considering. The result is that, for a Honda Civic, the best deal means paying 20% below Kelley Blue Book while on an Acura MDX, the best deal means paying 5% above Kelley Blue Book. Such variation is evidence that a particular measure of value is inaccurate. If a measure of value were accurate, price would equal value on average.
A note on value: unlike cost, value is subjective. Suppose everyone in the world is considering buying one of 2 cars: a 2008 Honda Accord without a sunroof for 19,000 and an identical 2008 Honda Accord with a sunroof for $20,000. Everyone, including you, agrees the one without the sunroof has a value of $20,000. Everyone but you thinks a sunroof is worth $500 (for a total value of $20,500); since you like stargazing from your car on clear nights, the sunroof is worth $1500 to you (for a total value of $21,500). Which car is the best deal you ask? To everyone else, they can get a $1000 discount on the Accord without the sunroof ($20,000 value minus $19,000 price) or a $500 discount on the Accord with the sunroof ($20,500 value minus $20,000 price). Therefore, the best deal for everyone but you is the Accord without the sunroof. You, on the other hand, can get a $1000 discount on the Accord without the sunroof ($20,000 value minus $19,000 price) or a $1500 discount on the Accord with the sunroof ($21,500 value minus $20,000 price). You pick the Accord with the sunroof. Even though you paid more, it was a better deal because of how much you value the sunroof.
So…in conclusion, get as many low, post-negotiation prices as possible and compare them to a consistent baseline like Kelley Blue Book, NADA, or Edmund’s, making value adjustments where you don’t think that baseline adequately adjusts values for super-cool features like a sunroof.
If you’ve made it this far in this post, congratulations. You should have majored in Economics. My wife, who makes fun of me for my “business talk,” would have lost interest long ago.




