Lot of variables here. Where vehicle is garaged/driven (state/city), age of drivers, driving record, number of vehicles insured, other policies with company, etc. I've heard State Farm is good if you haven't already tried them give them a call.
I have State Farm, $1050 per year, six months on, six months off (storage). Also have 6 other cars insured with them, as well as my house and an umbrella liability policy.
Unfortunately paying about $2300 a year with Allstate... they blame the rate on the slummy zip code I live in... Las Vegas Strip. :eek
Clean record, multiple vehicles and condo on the policy. :bs