I think that if
@partsmonsta wanted to continue to advertise here and restore or sell anything else, he needs to make things right with you. To me, that would mean a complete refund, and I would want proof of insurance on anything being shipped by him.
I always pay for additional insurance to cover the cost of shipping just in case I need to reimburse someone.
I also only use USPS as a last resort, and if the part is not fragile.
I’ve recovered many mail bags from airport belt loaders where the mail was destroyed.
This packing here shows me that he is too irresponsible to be trusted with classic parts.