Was this a food truck or a hotdog cart? Cuz a lot of the food trucks are hipster-y “elevated comfort food” and yeah you pay an arm and a leg. And regular hot dog carts don’t sell corn dogs. It sounds like you got charged the same as what anyone would pay.

Carts outside the Met charge like $5 for a hot dog and carts in other places charge more like $3. But that’s a cart not a truck and a hot dog not a corn dog.