Major Damage
- Chris Bailey's Comic Art Cafe features modern and silver age original comic art for sale and trade. Will trade classic animation art for comic art.
- http://www.majordamage.net/

MothComiX.com
- Modern and vintage original comic book art and collectibles.
- http://www.mothcomix.com/

Monster's Collectibles, Ken Danker
- Large and diverse collection of original comic art, from the golden age to the present.
- http://www.monsterscollectibles.com

McNeil, Carla Speed: Lightspeed Press
- Original art from Finder, Mystery Date, and other projects by Carla Speed McNeil
- http://www.lightspeedpress.com

Moy, Albert: Original Art
- A wide range of comic book, strip, and animation art in a wide range of prices. Will trade.
- http://www.albertmoy.com/

Manning, Greg - Auction, Inc.
- High-end comic book art, mostly from the Silver Age.
- http://www.gregmanning.com

MetalTV: Art from Heavy Metal
- The title (almost) says it all: The store sells more than just originals from Heavy Metal, though the focus remains on color work.
- http://www.metaltv.com/category.cfm?category=originalart

Media Services International
- Original art from Bernie Wrightson, Ken Meyer Jr., and Basil Gogos.
- http://www.mediasi.com

Maakies art by Tony Millionaire
- Originals from the popular alternative weekly and Dark Horse comic book artist Tony Millionaire.
- http://www.maakies.com/