Most breeders use Ship Your Reptiles or a similar service. Personally, I use SYR:
https://shipyourreptiles.com/

The website covers everything from how to package the animals to how to book a shipment. Most breeders are only shipping hub to hub right now due to shipping delays. If you don't live close to a hub, you will get tired of doing it for free. My opinion is that you can, and should, charge a reasonable price for your toads.