Cassie Mogilner and Jennifer Aaker from the Stanford Graduate School of Business conducted a series of experiments to see whether references to time or references to money would affect whether people stop to buy, how much people are willing to pay, and how satisfied people are with the products they buy.

https://www.blog.theteamw.com/2010/09/06/100-things-you-should-know-about-people-42-well-spend-more-money-if-you-dont-mention-money/