A reasonable analogy for how much people are willing to spend for gas is a ... gas station!
A gas station customer will often have 3 different mental models:
The gas price is high right now, I'll just get 10 bucks' worth to get to the cheaper gas station
My budget is 50$ for gas
I'll pay whatever it takes, just fill'er up.
We want to allow our users to think in similar terms, since what they care ultimately is the token cost.
A reasonable analogy for how much people are willing to spend for gas is a ... gas station! A gas station customer will often have 3 different mental models: