T's World of Comics and Original Art
Modern era original comic book art.
Tavole original art (Tavoleoriginali.net)
Original art from Italian comics, including Magnus, Toppi, and Liberatore.
Top Cow Productions
Features art from Top Cow artists including Marc Silvestri, Michael Turner, D-Tron, Billy Tan, Joe Benitez, and Gary Frank.
TRH Gallery
Tom Horvitz' Gallery offers a wide range of comic, strip, animation, science fiction, fantasy, and pulp art and does appraisals of same. They also represent the Estabon Marato, Frank Thorne, Lenil Yu, and the estate of George Herriman.
Tri-State Original Art
Tri-State offers a wide range of original comic art, ranging from the Silver Age to the present.