That's not price discrimination, like hardcover vs paperback if you have two versions of something and people can choose which they want. That's totally fine and actually something that makes capitalism great. The rich usually end up covering more of the costs here cause they are less price sensitive, like business vs economy on airplanes.

Price discrimination is when two people visit a site to buy a book, the algorithm computes an estimate of what they are barely willing to pay, and then shows the two of them different prices for the exact same book based on who they are.