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Sales data is collected for Atomic Avenue and from Heritage. If you ever notice a price for a listing in the database that should be looked into, use the 'Request Price Check' option under ComicBase's internet menu; our editorial team will look into it further and adjust if needed.

You can add custom grades and percentages. ComicBase makes valuations based on a % of their NM pricing. For instance, CGC 9.0 is 160% of the value of a NM non-graded book. If you want to add a SS grade, simply go to Setup/Grading, and click on the green + to add a new grade. Example is for a 25% premium for SS over the CGC Universal grade. You'll have to do some math, but it should give you what you want. FYI: The percentages that CB uses for 9.8 grades can be wildly off base. My 9.8 NM 98 shows a price of $6,800, which is 1200% of the NM price they list of $570 for the book. I *wish* I could sell mine for that!

Strange. Try it this way, bring up a Find window (CTRL+F or click the Magnifying glass icon). Select MyComics in the Find drop-down box. Optional (and should be redundant), click the List Only Items In Stock check box in the bottom left corner. When I run this I get a result of all my comics.