My recommendation would be to use a local independent shipping store. They can box and pack for you and then help you select the best shipper
In Los Angeles where I used to live I regularly worked with Box Brothers and shipped many items larger and more fragile then yours. Someone like them close to you should be able to help.
Avoid the franchise FedEx or UPS stores unless you really know the person you are working with
maybe members in NJ where you are can provide a recommendation
ps having seen the item you are trying to sell I worry that it was never designed to be shipped. Personally I'd feel much more comfortable taking it apart and packing each item separately and the wooden case in its own carton. Of course this increases the complexity considerably.
In Los Angeles where I used to live I regularly worked with Box Brothers and shipped many items larger and more fragile then yours. Someone like them close to you should be able to help.
Avoid the franchise FedEx or UPS stores unless you really know the person you are working with
maybe members in NJ where you are can provide a recommendation
ps having seen the item you are trying to sell I worry that it was never designed to be shipped. Personally I'd feel much more comfortable taking it apart and packing each item separately and the wooden case in its own carton. Of course this increases the complexity considerably.