Note: "Prospective Benefit" is not a good translation for "tovat hanaah," but I am struggling to come up with a better translation.
Considering tovat hanaah to be Money or Property
Defining it as money or property: Pesachim 46b, Bava Metzia 11b
Vis-a-vis Dough-Tithing, in paying someone to give it to a specific Kohen: Pesachim 46b
Acquiring the Prospective Benefit via Acquisition of another Item: Bava Metzia 11b