All Star Auctions - High-end original comic book and strip art, illustrations (including Frank Frazetta) and vintage comic books. They also offer an appraisal service.
American Dream Internet Gallery - Art agents for modern comic book artists including Charles Adlard, Mark Buckingham, Will Simpson, and Bryan Talbot.
Anthony's Collectibles - Anthony Snyder deals mainly in Silver Age through Modern comic book art and comic strips.
Art of Comics - Original comic book art by Bryan Hitch and Paul Neary.
Art Originals - Moderately priced comic strip and comic book art.
Artguy - Dealer Hugo Brach selling mostly modern original comic book art.
The Artist's Choice - Spencer Beck, artist representative, specializes mostly in modern comic art, and representative for artists including Jim Aparo, Nick Cardy, Colleen Doran, Ramona Fradon, John Romita Jr. and the estate of Curt Swan.
Artworkworld - Mainly modern comic book art, with a smaller selection of strip art.