Does this Seem High for Insurance ?

Hi,
what people pay mine seems really high for what I drive. I'm a 30 year old male , perfect driving record ,good credit , I have multi car discount with State Farm . My 2005 civic is 85 a month and my 2003 Nissan 350z is 100 a month. I was reading just out of curiosity what insurance costs on a c7 corvette . Granted these guys could be much older than me but many of them said their semi annual rates were 500 or less and that's basically what my 05 civic costs me . I've done a little shopping around and gotten even higher rates than what I pay now . Do my rates seem high ??
Please help.

Thanks!

I didn't find the right solution from the Internet.

References:http://www.insurance-forums.net/forum/auto-insurance-forum/does-seem-high-insurance-t88656.html

company case study