Yamaha 1966 sg3 sunburst

I have a yamaha 1966 sg3 sunburst. Has not been used for over 45 years. My dad bought in 1966.  Needs some work done to it. I am not a guitar player so i really don't know exactly  the extent of work needed. I can post some photos. I want to sell it and i am wondering should i even bother or should i just keep it? does it have any value?  Thanks for your time, Athena