=====================To the best of my knowledge in Ohio at least you dont need a license to own what would be classified as a C&R gun(except full auto of course).
If you are interested in getting you C&R license to collect. It is only $30 and you will be eligible for C&R discounts when you buy anything classified as C&R buy the ATF.
Try this site
3 year license.Is it very hard to get a C&R license? Is there alot of paper work to keep up with? When it is time to renew it, do you just sent your money and get a new one or do you have to be approved again?