I'm thinking they are in the $14 - $16,000 range. We are currently fighting with the insurnace company to get it covered -- in the meantime Hill-Rom still provides the vest to use, use, use !
If insurance coverage is not a possibility you can watch for them on ebay -- they do show up there occationally -- a lot of people without CF have had them prescribed for use and then no longer need them.
Good luck!