Seems something like [Proportion of People OK w/the Wine] - [Price] might be:

50% - $5
75% - $10
90% - $20
95% - $30
99% - $50

I made all of this up. Who actually drinks wine? Did I come close to your made-up numbers?

Also assume some of the highest-rated wines at each price point for consumers who appreciate that style in general.