Small Scale Military Headquarters

Like the title says. I need to thin the herd out a bit and get rid of some 32x aircraft. I've packed tons of different items for Ebay and a few 1:18 aircraft but I was wondering what other folks did to keep the props from breaking. On the 1:18 aircraft I used big built-up cardboard affairs but I know there must be an easier way.

I've wrapped the prop (as well as the rest of the plane) in a lot of bubblewrap and have had success with shipping as well. It works for both 1:32 and 1:18 planes