I know about the psychology behind prices that end in 9 or 99, but I'm starting to notice that some prices contain the same digit (not 9) repeated two, three or even four times.

For example, in this week's leaflet a popular German supermarket is advertising tangerines for €1.11, plum tomatoes for €0.88 and onions for €0.66, but nearly all their other prices end with a 9. I remember seeing this pattern also in other circumstances, like a restaurant offering sandwiches for €7.77, and in phone rates.

What is the point of having prices like that? Do they make the product more interesting in any way?

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    $\begingroup$ Interesting observation. Perhaps there's a group of behavioral economists behind the scenes trying to study the effects repeating digits in prices on sales! $\endgroup$ – Herr K. Feb 12 '18 at 17:19
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    $\begingroup$ In marketing, I believe this is known as “charm pricing.” If you search under that name, you might find resources on that topic. $\endgroup$ – Brian Romanchuk Feb 12 '18 at 17:36

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