Hi, do you mean the customer doesn't want to buy your item even though you have a lot stored?
For the money, I suggest you to edit the save file to add the money. Go to
C:\Users\(user name)\AppData\Roaming\Godot\app_userdata\Pawn Pleasure
look for file named "save.tres" you can open it with notepad and look at the bottom of the file, you can change money value to any amount that you want.