Do not ever ship a Mac. E V E R .
To pack a Mac like this properly, you are talking a few large OfficeMax style boxes of bubble wrap, and 2 boxes (large and larger). I packed up an MX-110 that I sold to Terry during a series of gear refurbs and swaps. I spent $100 on packing materials alone - plus 50ish dollars in shipping and insurance fees to do the job right. It made it OK, but I was fingernail-less by the time it got there.
When shipping ANYTHING, one must understand what your item is subject to. It could be dropped from any angle from a height of 6 feet or more (not good for Mac glass faceplates). Think automated conveyors in massive sorting/routing warehouses with "punch arms" that send your Mac through the proper "chute" for your route. Guess what happens if one of these "punch arms" misses the proper chute - like going over the side of the conveyor to a 6+ foot fall to a concrete floor. When that Mac weighs 50-100 lbs, you KNOW that's gonna hurt.
One of my MC-30's had a similar fate. I purchased a pair of MC-30's from a west coast seller, complete with ebay feedback expressly stating that said seller was a good packer. Well, guess what? One amp arrived with one bent end - props to Terry for getting it back to a good looking unit. But that was the last straw. No more shipping my precious Macs. If they need to see Terry, I will deliver them the 11 hours necessary to guarantee that they arrive at Terry's as they left my home.
My own personal experience, as well as this thread tells me - NEVER SHIP A MAC!