I had $1,000 deductible for over 35 years. We bought a new Toyota with zero percent financing and Toyota Motor Credit requires no more a $500 deductible. I was shocked at how little difference it made in my premium. $25 more every 6 months. Insurance rates always baffle me.
Actually a $50 a year difference seems rather high to me. The maximum additional amount the insurance company would have to pay would be $500. Isn't that basically saying there is a 10% chance you will total your car? Unless you have a terrible driving record there is no way their risk is that high.