What is the average cost of liabilty insurance?

Liability Insurance rates vary based on the type of policy such as Professional Liability, and General Liability each policy type is different so the ratings are different. The premium is also based on the carrier (admitted vs. non-admitted) and the carriers rating (A+, A, A-, B+, B-).
Another factor is the type of business, gross receipts, payroll if any are some examples.
If you would like to obtain a quote I can certainly assist you in that, you can message me on my profile if you are interested.