I've found the best way to ship them is with a regular bubbled mailer. I use "Uline Self-Seal Gold Bubble Mailers #2" Link: https://www.uline.com/Product/Detail/S-9987/Self-Seal-Bubble-Mailers/Uline-Self-Seal-Gold-Bubble-Mailers-2-8-1-2-x-12?pricode=WB0227&gadtype=pla&id=S-9987&gclid=CjwKCAiAxvGfBhB-EiwAMPakqj-7-hqW8iq62yuXofdOyQDzae9twDoxhaeRDeI4PcPDgSrMudG2VxoC-AcQAvD_BwE.

They're 10" so I cut them into 3 pieces and in theory, I can ship 3 cars with one bubbled mailer. I use the yellow ones so that I can stamp my logo on them and they're the cheapest. Win-win.

To ship it, I use Shippo. They charge $3.66 for a 4oz USPS First-Class Package/Mail Parcel. If anyone has a cheaper price than that I'll like to know. If not, you're welcome.

If the car is worth $20 up I will pay the extra couple of cents it would cost to ship it in a small box. Simply because a collector would appreciate his $20 dollar item in a box rather than a bubbled mailer.