My Inland Marine policy is thru The Hartford. The broker I used was Heritage Insurance Services at Heritage Insurance Service - Insurance for fine musical instruments Insurance My annual premium is around $250 for all my stuff, which includes basses, keyboards, PA, my piano, etc. As was mentioned, that's a business expense for tax purposes. I also have never had to make a claim (fortunately), but with all the instrument thefts I read about on FB, I'm glad I have the coverage.
