Supply curves are literally predicated on one price for a market.

Not sure that is applicable here.

The practice — supported by artificial intelligence and known as dynamic pricing or surveillance pricing — can lead to two consumers paying different amounts for the same item from the same retailer, at roughly the same time. If a store knows, for example, that one of those customers lives in a wealthier neighborhood, it can charge that person a higher price.

Better that you stick to promoting D instead of defending price gouging.