Why a $39 Dress Outsold the Same Dress at $34
Two researchers once sold the exact same dress at two different prices, and the more expensive one won.
This is a real experiment, not a story someone made up to sound clever. In the early 2000s, two academics named Anderson and Simester ran a field test with a clothing catalog. Same dress, same photo, same everything. The only change was the price on the tag. At $34 it sold a certain amount. At $39 it sold more. Then they ran it again to be sure, and the higher price won again.
Read that once more. People bought more of the item when it cost five dollars extra. If price were only about the number, that is impossible. So something else is going on, and once you see it, you will never look at a price tag the same way again.
Prefer to watch instead of read? Here is the same idea in a short video: Why a $39 Dress Outsold the Same Dress at $34.
The first digit does the thinking
Here is the mechanism. When we read a price, we do not carefully process every digit. We anchor hard on the one on the far left and skim the rest.
That is why $1,997 does not land in your head as “basically two thousand dollars.” It lands as “one thousand, nine hundred and something.” The leading 1 sets the frame, and everything after it blurs. Marketers call this the left-digit effect, and it is one of the most reliably proven findings in all of pricing research. A price of $19.99 reads as “nineteen,” not “twenty,” even though the difference is a single penny.
So the last digits of your price are not rounding errors. They are a signal. The question is what signal you want them to send.
Not all charm prices say the same thing
Most people know the number 9 trick. Prices that end in 9, like $49 or $199, tend to lift sales. That part is well documented, and it is the piece of this most business owners have heard.
But there is a second layer almost nobody talks about, and it is the layer that matters for anyone selling expertise. The specific ending you choose carries a tone.
A price ending in 9 whispers bargain. It is the sound of a discount rack, a clearance sticker, a deal. That is a good thing when you want it. If you are running a flash sale or a low-cost entry offer, an ending in 9 leans right into the “this is a steal” feeling, and it works.
A price ending in 7 sends a different message. It reads as considered. Precise. Like a real number someone arrived at on purpose, rather than a round figure pulled from the air or a bargain-bin markdown. For premium work, that difference is everything. You do not want your serious offer to sound like a clearance item. You want it to sound like it is worth exactly what it costs, and not a dollar less.
Choose the digit that matches the message
This is the practical part, and it is simpler than it sounds.
Do not pick a price ending out of superstition. Pick it to match your positioning.
If the offer is meant to feel like a deal, a fast yes, an easy entry point, an ending in 9 fits. It signals value and lowers the resistance to a quick purchase.
If the offer is meant to feel premium, expert, and worth the investment, an ending in 7 fits better. It signals precision and confidence. It tells the buyer that you priced this deliberately, because you know what it is worth.
Either way, you almost never want a bare round number on your serious offer. A price like “$2,000” is a blank wall. It gives the buyer nothing to hold onto except the size of the number, and the size of the number is the one thing you do not want them fixating on. Nudge it to $1,997 and the left-digit effect goes to work for you, while the 7 quietly says this was chosen with care.
Why this matters more for you
If you came out of a career built on precision, this will sit right with you. You spent years in a world where the details carried the message, where a small, deliberate choice signaled competence to anyone paying attention.
Pricing is the same skill in a different setting. The number on your offer is not just a request for payment. It is a piece of communication. It tells a stranger, before they have read a single word of your sales page, whether they are looking at a bargain or at serious professional work. Most people never think about it, so they leave that signal to chance. You do not have to. You can choose it, on purpose, the way you have chosen the important details your whole life.
The Bottom Line
The last digit of your price is talking to your buyer whether you meant it to or not. Round numbers waste the chance. An ending in 9 says bargain, an ending in 7 says premium, and the left-digit effect means a price just under a round number almost always beats the round number itself. Pick the ending that matches the message you want to send, and let it do its quiet work.
If you are still working out what to charge for what you know, that is exactly the kind of thing we walk through inside The Foundation, our free starter course on turning your expertise into a business. Start at https://rhynowerks.ai
