“…the average person treats a price ending in .99 as if it were 15 to 20 cents lower.”
The tendency is called left-digit bias, when the leftmost digit of a number disproportionately influences decision-making. In this case, even though the real difference is only a penny, research shows that, to the average person, $4.99 seems 15 to 20 cents cheaper than $5.00 – which results in selling 3 to 5 percent more units than at a price of $5.00"
Why Literally (Almost) Every Price Ends in 99 Cents
https://en.wikipedia.org/wiki/Psychological_pricing
EDIT: The left-digit bias is not just pennies / cents. It applies when going from $99 to $100…$399 to $400…$999 to $1000 etc.
EDIT 2: If you have a car for sale and you want $10,000 for it are you listing it for $10,000 or $9995?
It’s a dark pattern. Maybe at one point in time people would be tricked into believing $3.99 was emotionally a lot less than $4 but we’ve grown up with it now for several generations. Everyone knows it costs more anyway because of taxes not being applied until the register. The mistrust is built into the system out of tradition more than anything.
If at any point left-digit bias stopped working then merchants would increase the price by a penny or a dollar (when going $99 to $100). Walmart is not going to leave money on the table. It still works.
It still works at scale. If I’m selling a couch on craigslist for $10, I’d have to be a massive butthole to advertise it at $9.99. The fuck am I going to do, give them a penny in change? $10 is $10. I only need to sell it once, and I do not have the patience to deal with someone looking to haggle.
I understand. But what if you’re selling a refrigerator or laptop for $400? You could list it for $399 or $395. The left-digit bias is not just pennies / cents. It applies when going from $99 to $100…$399 to $400…$999 to $1000 etc.
Then I want $400. Like I said, I onlyhave to sell it once. I don’t need to sell it to more than one person.
And if I saw someone selling a refrigerator for $399, personally it would make me doubt their trustworthiness.
The left digit bias is real over large groups of people. You’re going to sell more laptops at $399 because of left digit bias, but it doesn’t make a discernable difference when you’re only selling one. And again, then I have to deal with making change. Somebody’s going to hand me four hundred dollar bills, and I’m going to dig into my pocket for a crumpled single? Or maybe three quarters, two dimes, and a nickel?
Not trying to start a debate with you and I know you’re just talking about a $10 item (and I agree with you on that) but your comment about “not looking to haggle” being the reason you’d use a whole number is not in agreement with another psychological trick.
When Negotiating A Price, Never Bid With A Round Number
That’s not a persuasive argument. I’m not interested in haggling. The price is $10. If you see that and think “Oh, I’ll offer $5” then the answer is “no”. We’re sure as shit not going to meet in the middle at $7.50.
Same argument at $400. That’s what I want to get for it, which is why I put that price on it. I don’t want $399 or $250, because life is too short and I’m not that desperate to sell anything. I’d rather give it away for free than haggle with someone over the price. I don’t need to sell it today, and I’m happy to wait for someone who is willing to pay the asking price. I’m not running a pawn shop.
Well, that’s only if you’re in the US.
This trips you up so many times if you visit the US from somewhere else. The number of times I’d see a snack listed for 99c, have a dollar bill on me and then they ask for like $1.12 is higher than I’d like to admit.