Below are some links which you might find useful in the search for comics that you want to buy or sell. If you have any suggestions of a link please let me know via either comments or contact me and I may add it to this page.
The Grand Comic Database - Find out if a comic exists and get a scanned cover of it as well. Pictures of all the back issues.
Comics Price Guide - Get the latest prices for your comic collection in US dollars though.
Spiderfan - Possibly the best Spider-Man resource.
Comic Wallpapers - Get desktop wallpapers dedicated to comics for free!
Amazon - A good place to start and find some trade paper backs and graphic novels.
eBay - Get yourself a bargain. Free to register and easy to use.
Manaleak.com - UK based company specialising in the Trading, Buying and Selling of Magic The Gathering, World of Warcraft and many more Hobby Games and Accessories. Free 24 hour worldwide shipping here!
Bazaar Games - UK based Hobby Games store. Specialising in Magic the Gathering from Alpha to the present, plus many more games and accessories. Worldwide shipping.