All About Pocket Knives

I have a 1976 case trapper that has a broken spring also It has been sharpened. Otherwise in really good shape. This knife has sat in a drawer since 1977. So the question is what’s my best option for this knife? Will case replace or repair this knife? Should I spend the money to get it repaired? Sell it as a parts knife? Thanks for your input.

well worth replacing the spring on. Don't think case will do it since it's an older model. should cost around $30 for a certain mechanic I know to replace it