How much will my car insurance go down?

My wife and I pay 390 a month with Geico for car insurance. Now, this was the best rate I could find with her driving record. She has several accidents and about 5 tickets. I had to get liability, but we have a loan out on her car and so I had to get full coverage. I'm just trying to figure out how much it will go down after the 6 months of no claims or tickets.