For my custom orders, I have a base deposit. For example:
Woman requests a small Radical Bear.
"That will be $15 to start. If the item isn't purchased by completion after 2 weeks, it will be a public listing for anyone to purchase."
Woman pays $15.
I start, I finish, I list the item and the final price.
"Your item is ready. You have 2 weeks to purchase it until it because a public item for anyone to purchase."
If the woman purchases the listing, great. If she doesn't, that's great too. It only means other people will have a chance at an awesome item. :D