Pawnshops in Night Vale work like this.
First you need an item to pawn.
To get this, you need a lot of time behind you, years spent living and existing, until you've reached a point where you believe that you exist, and that a physical item exists, and that the concept of ownership exists, and that, improbable as all those are, these absurd beliefs line up in a way that results in you owning an item.
Good job. Nicely done.
Second, once you believe you own an item, you must reach a point where you need money more than you need the item. This is the easiest step. Just own an item and own a body with needs, and wait.
The only pawnshop in the town of Night Vale is run by the very young Jackie Fierro. It has no name, but if you need it, you will know where it is. This knowledge will come suddenly, often while you are in the shower. You will collapse, surrounded by a bright glowing blackness, and you will find yourself on your hands and knees, the warm water running over you, and you will know where the pawnshop is. You will smell must and soap, and feel a stab of panic about how alone you are. It will be like most showers you've taken.
