Buying and selling comics has become a huge part of the collecting hobby. Often, people were limited as to where they could buy and sell those comics, but now with the Internet, the common collector has an immense wealth of places to get the perfect item for their collection or get out of the hobby all together. Take a look at the top auction sites out there and start shopping and selling.
Ebay is still the largest auction site out there. They are hugely profitable and popular. Their tag line is, "You can find it on ebay." And when they say that, they mean it. With so many auctions to choose from, your bound to find just the perfect item for your collection as well as being able to sell your comic with such a large user base. They have had problems lately and have tried to make things easier for buyers by changing their feedback structure, but their rising fees may make them lose their top spot.
Heritage is one of the larger and better known specialty comic book auction sites. They specialize in rare comics and will either buy your comics to sell or they will work on a consignment basis. This means that you go to them with your collection and they offer it up for sale to their members. They do take a cut of the final sale, which varies from case to case, but usually starts at about 15%. One really great thing about Heritage Auctions is that they will allow you to put together a "Wants List", of comics you are looking for. When one comes available, they will let you know. That's going the extra mile.
Amazon.com is making a play against eBay to become the premier sellers destination. They have a complete different fee structure that only charges you if your item sells, which is becoming much more attractive for sellers the world over. Amazon.com still has more graphic novels than floppies, but they are starting to become more common. If sellers become less satisfied with eBay then Amazon.com stands to be a major player and could easily surpass eBay's hold on the comic auction market.
Comic Link specializes in selling comic books and comic book art. It is run by experts and enthusiasts in the comic book field. Like Heritage, they offer a want list feature for buyers to match them up with sellers. They also offer consulting to people looking to invest in comic books by buying rare comics that will go up in value over time. They also have a large range of CGC graded comics, comic books that have been graded by the CGC company, guaranteeing the condition of the comic.
Hakes specializes in older and vintage comic books but also has a large collectible base as well. Their main page has hundreds of categories showing how many auctions are going on at that time. This makes it really easy to find just what you are looking for. If there is something related to comics and is of vintage age you just might find it here.
The Pacific Comic Exchange touts itself as, "...the largest computerized online comic book trading company specializing in Golden and Silver Age comics from 1933-1969." The nice thing about PCEI is that they take your comic book, grade it themselves, and then list it with your asking price. They put a lot of personal touch into their business. Owner Robert Roter is a self proclaimed comic book enthusiast and it shows in PCEI's hands on philosophy.
Foo Comics is a newer subscription and auction site where you can sell your collection or set up shop online. Their fees aren't bad, with their listing and closing fees similar to eBay but overall seem less. If you are looking for a fresh start from eBay this could be the place for you.
