A headless marketplace is a marketplace where the traditional user-facing interface (website/app) becomes decoupled from the core marketplace functions. Users are increasingly accessing marketplaces’ inventory through third-party AI interfaces (such as ChatGPT, Claude, etc.) rather than visiting the marketplace’s own website directly.
My understanding is that it's trained on the prior quotes from the pros that it connects you with. So the quote you get and accept is the one the pro is working off of.
It is largely the people who are comfortable with the probability of getting caught but know that MOST stores have a policy to not engage with a shoplifter due to liability concerns.