Anchoring bias occurs when people rely too much on pre-existing information or the first information they find when making decisions. For example, if you first see a T-shirt that costs $1,200 – then see a second one that costs $100 – you're prone to see the second shirt as cheap.
https://youtu.be/EQI4VXgVGrc
https://youtu.be/EQI4VXgVGrc