Instructions
Check reference books such as "Tomart's Encyclopedia &Price Guide to Action Figure Collectibles" and reference magazines such as "Lee's Toy Review" to determine the value of the figures you are selling.
Explore comic book shops. Most shops are eager to buy your collectible action figures. Their customers tend to be collectors themselves and will pay a premium for hard-to-find figures.
Attend toy, collector or comic conventions in your area. If your collection is large, consider renting a table to display your collection. For a fairly low cost, you can sell to a targeted audience.
Sell your action figures through specialty websites. Sites such as Collector Dash Action Figures allow people to post their merchandise in a database where it will be seen by thousands.