I like Naplia because they know our business, they will get you different quotes from different companies to choose from.
www.naplia.com Prices WILL vary a LOT due to limits, location, coverage amounts, etc.
It's not a bad idea to get a quote from the company you have existing policies with (homeowners, etc) as sometimes you can get a discount. I'm just guessing but rates will probably run on the average $900-$2500 per year.