I have a collection of about 1000 comics - mostly one from 80's and 90's with a few from the 50's and 60's. Star Trek, Star Wars, Superman, Batman, Catwoman, etc. DC, Marvel, Dark Horse, etc. Most were boxed and bagged immediately after a quick read. Almost all were purchase in local comic book store. I put them into a cataloging tool and did a quick grading that you can do automatically in the software and the software suggests $5,000 valuation based on $2,000 original cover price (although my grading may be way to high). Should I get them certified to realize something close to the suggested valuation and what is the best way to sell them?