This Limited Edition item was available for 500 MC from September 16-October 8, 2010 and gave 1 xp when bought. The description reads "Contains 1 of 5 exclusive MC surprises that can't be found anywhere else!" True to its description, all items inside the Bon Voyage Mystery Crate cannot be bought elsewhere. What you get from the Bon Voyage Mystery Crate is entirely random however, so there is no way to pick and choose, or to "increase" your chances. It is possible to receive the same item more than once if you purchase the crate more than once.
This crate is not the same object as the Mystery Crate or the Mystery Gift Box, nor will it give the same items as the other two.