GPAnalysis is one of my “highly recommended” services for getting up to date comic book value and price data. If you’re not familiar with them you can check out their site at GPAnalysis.com.
The company gathers actual sales data of CGC graded comic books from E-bay, auction houses and trusted sellers. You can then search through their records (going back to 2002) for any comic. You’ll see sales prices highs, lows, trends, and more. It’s an amazing product and is very reasonable priced. If you are a serious collector I say it is a must have. If you are just looking to do a one time sell of a lot of comic books I still recommend it – you can cancel the service at anytime. I’m a fan because you’re not getting opinions about comic prices, you’re getting actual sales data.
The best part about GPAnalysis is they just announced a mobile service! You can access this product from an iphone or any other mobile capable browser. Talk about a great tool! You’ll no longer have to wonder about CGC pricing data at conventions and stores, you can instantly access it from your smartphone!
If you are interested in the service visit their website at GPAnalysis.com