Priced by Weight
It’s not a proper scam per se, but food sold by weight in units you don’t know.
Vendors may try to pile on dense food because they assume American tourists are unfamiliar with weighing food in anything but pounds. And at least with the people I’ve traveled with, they’d be right. A classmate once paid about $22 for what was basically a bowl of mashed potatoes.
Story credit: Reddit / SumoSizeIt