your kit is the cleanest and the case and plastic liner are the best condition of any kit that I have seen. It would be a shame to destroy the liner during shipping, as happened with the kit I bought so many years ago. Those large metal tools will destroy that liner long before it is delivered to the buyer.
Earlier this year I stumbled across a kit that I resold to an owner in Utah. I shipped all of the tools in a flat rate USPS box. Very economical, VERY well packed and heavily wrapped with fiberglass reinforced tape to ensure package integrity. The large pipe piece did not fit and it was packaged by itself. The case should be shipped empty by itself. You ....might.... be able to leave the pipe in the case without shattering the liner if you pack it very well.
Good luck
Larry