You're thinking of the Law of Diminishing Marginal Returns
"sweet spot", "the point of diminishing returns"
Re:Being Poor (2005)
by amanaplanacanal on Saturday May 22, 2021 @03:34PM
(#27249615)
When it comes to clothing, a lot of people pay extra for specific brands, especially if the tag is on the outside so that other people can see it. Best not to do that if you are looking for good value.
The quality difference between a $10 product and a $100 product of the same type is enormous. But then when you go up to $200 the quality increases much less. There is a name for this that I can’t recall right this second, the point being that there is a sweet spot price/quality wise for most things.