I don't know anything about comics, please help

I have a bunch of comics I'm trying to sell on ebay but some of them I can't seem to find there or online(to gauge the price range.) For instance Iron Man When Armors Collide Direct edition Dec 2, it's hard to find the price for it, and i don't know what direct edition means is that more special?

@ditalu:

Check out the Overstreet Price Guide, they have all of the current prices up to date and listed by quality. Basically what 'direct edition' means is that the book was sold at a comic book shop. It's as opposed to 'newsstand,' which means it was bought at a drugstore, a 7/11, a grocery store, etc. Usually it doesn't affect value, and the prices are pretty much the same. Hope that helps!