Could you tell us where?
If it is any consolation I had 2 headsets, a skymap GPS, a handheld transceiver and an EPIRB taken from the monowheel Europa I used to own when it was in the hangar at Bodmin 4 years ago.
I put notices up, informed the fuzz etc...
Nothing ever found.
What I learned from the experience was that it was essential to keep a record of all the serial numbers of all pieces of equipment as these often have to be quoted when updates/servicing/repairs need doing and are probably the best way to catch these low-life scumbags (more likely to get the people they've sold the stuff to and track the thieves that way). I had no serial numbers on that occasion
!
Good luck,
SB