The research shows that customers will pay more on average if they have a higher priced item to compare against. Their perception of value changes the higher the number they are comparing against is.
This phenomenon was illustrated very well in a study that took a completely irrelevant number – the last two digits of the respondent’s social security number – and then asked participants to bid on different items for sale. Those with social security digits in the upper 20% bid 200% - 300% more for items than those with digits in the bottom 20%.
Why? Because people innately base their perceived value for a product on the next relative number, whether it’s the last two digits of your social security number or a $25 prime rib.