Online is usually cheaper for a lot of goods. Two days ago, I wanted to get a physical copy of an older game that is getting harder to find. It was way more expensive buying from a physical store, so I searched for it online. The price difference for the exact same product between searching in my PC’s browser and through my phone was about $8.

My phone tracks my habits more easily, so I think they assumed I’d be more likely to buy from more expensive sellers if they just withheld showing me the cheaper ones. I could see the same more expensive options on my PC, but nothing below a certain price point on my phone. In a physical store, they’re only able to advertise one price. But online, when there can be multiple origin points for a product in a single market, they can simply withhold showing you some of them.