Answer:
non-resellable goods
Explanation:
Sometimes goods that are so uniquely customized in order to fit or serve only one client, cannot be sold to anyone else. This type of goods are considered non-resellable since it is very difficult or very unusual for another customer to purchase such a good.
E.g. suppose that you have a lot of money but at the same time like rainbows and decide that you are going to purchase a Porsche, but you are going to customize with a rainbow like paint and interior. This car would be so unique that only you would buy it and drive it.