Gabriel (let's say he's called that) the fruit seller, sells tropical fruits.
Suppose there are several fruit sellers in that place, but they are not tropical. So people approach all these stores, saying "I want tropical fruit" but, unfortunately, none of their fruits are tropical.
So Gabriel is the only one who sells tropical fruits with unique flavors
So you could say that he says, "people want tropical fruits, but they can't get them" so once they get to his store, people will finally find him, and compare his fruits.