Saving good CPUs while scrapping

Hey all I was just tearing down some boards and trying to save some of the CPUS for resale, in the past I have used anti static foam, but still damaged a few. Just curious what methods others are using to cull/ save the "good" CPUs while your working.

If I am saving a CPU, I have some tiny anti-static bags that i place them in. I used to just file them into a small box, but I now have a couple hundred harder plastic cell phone battery packages that close nicely around them, bag and all. Keeps them nice and safe unless they are smashed or stepped on.