NO!!!!!
Pony up some money and buy anti-static bags from the local electronics shop!
AND *NEVER* ship cards in an Amiga, they have a BAD habit of coming loose or causing other problems. You may write fragile on the box, but that's no gaurenty that your box will be treated as such.
Pack in anti-static bags, seal them up with tape and lay down a VERY thick layer of peanuts in the box. Lay MLB on the bed of peanuts (excelsior actually!) and then fill the box with them.
How do you know if you have enough in there? If you hear NO movement from the box when you close it (and hold it closed) and shake it.
If in doubt, add MORE excelsior to the box!!!