The very first anecdote (IIRC) in Cialdini's Influence is about exactly that effect. Seems to happen most when people don't have a good way to evaluate product

The very first anecdote (IIRC) in Cialdini's Influence is about exactly that effect. Seems to happen most when people don't have a good way to evaluate product quality (which is most of the time, really—consumers with the time and information access to be well-informed about more than a tiny fraction of what they buy is a first-week-of-Econ-101 fiction, like physics' "spherical pig" but even less connected to reality)