Rent

Rent is an obligation that Goodman Grey is subject to. It is first mentioned in Skin Game.

Description
Rent is a payment Goodman Grey has to make yearly, toward which he requests payments of a single dollar.

Skin Game
In Skin Game, Goodman Grey requests one dollar from Harry Dresden for rent, which Dresden needs to borrow from Michael Carpenter.

Monsters
In Monsters, Goodman Grey earns a single silver dollar from John Marcone in exchange of a cleaning job Grey performs for him.