value of GRAD angle mode, thought experiment

[brouhaha]

This is a thought experiment. Pretend that this is market research that a big calculator company was doing in the heydey of scientific calculators.

Imagine that you are buying a new RPN scientific calculator for daily use. It's not a specific brand, though it's a respectable brand. You're not buying it because it is rare or valuable, nor because you have any expectations that it will become rare or valuable. In other words, you're not buying it due to any collectable value, or as an investment, or as a toy.

Also imagine that you're on a modest budget. Maybe you're a college student, or a young professional.

The calculator is available in two models. One has settings for degrees, radians, and gradians. The other has only degrees and radians. They are otherwise identical. The one with gradians costs more.

Do you buy the calculator with gradians? How much of a price difference would there have to be for you to decide you do not need gradians? (Remember, the scenario is that you have to stay within a modest budget.)

Perhaps the non-gradians model costs $100. Would you be willing to pay $5 more for gradians? $10? $25? $50? More?