To manufacture to your specifications, a new mold or tooling is required, as well as the size and type of the product.

When ordering factory samples, you generally only have to pay for shipping.

When ordering customized product samples, the cost may vary from $5 to $10,000 depending on the cost of tooling (if applicable).

As an example:
In the case of ODM electronics, the price range is $10 to $500
In the case of OEM electronics, the price range is between $500 and $5,000