where can i find an easy price guide for comics?

I have been looking and can’t figure it out. I have several comics I would love to price. I search my comic but just find basic info not pricing. ie The Silver Surfer: Job hunting, i know it is a part of the lost series spt 41.then the silver surfer may 80 morg vs terrax, plus other. they are in very good condition still in the plastic. i bought them years ago for a nickel at the good will.