Shipping an arcade game or pinball machine can is scary for most sellers. But this does not have to be the case. Certainly not if you take the correct precautions.
First you will need a pallet to put your game on, and strap it firmly to the pallet with eg a rope or lashing straps. You have to protect the machine so there will not be any scratches by packaging or shipping. You can do this by using cardboard and bubble wrap. And to finish it you can use shrink wrap plastic.