I'm making a list of game-ready model shops, if you know another ones please tell me ^^ here's what I've found so far:
(alphabetically sorted)

3dbud.com
http://img118.imageshack.us/img118/8018/83767809.jpg
(fantasy characters - animals - monters) - <they have just updated new monsters and characters>
3dbud - Real-time 3D models: 3D Characters 3D worlds 3D Demos

3drt.com
http://3drt.com/3dm/characters/real-...bies-3d_01.jpg
(fantasy - scifi characters - animals - monters) <new zombie pack>
3DRT - Real-time 3D models: 3D worlds 3D Demos

adenfall.com
http://www.adenfall.com/modelalbum1/bedroom_render.jpg
(game objects)
Adenfall Software

arteria-gaming.com
http://www.arteria-gaming.com/fantheme/fanthemelogo.jpg
(game objects)
Arteria3d

cubixstudio.com
http://www.cubixstudio.com/products/...PC_CloseUp.jpg
(fantasy - scifi characters)
::Cubix Studio::

dexsoft-games.com

http://www.dexsoft-games.com/texture...mb_banner3.jpg
(game objects - fantasy - scifi characters) <new cool fantasy characters>
Dexsoft Multimedia, game models, game-ready, low-poly models, textures and music

frogames.net

http://www.frogames.net/frogames_images/bandeau_2.jpg
(game objects - fantasy - scifi characters) <mmorpg character pack>
Game development resources, 3D models & content packs

gamebeep.com
http://img142.imageshack.us/img142/962/26031368.jpg
(game objects - fantasy - scifi characters)
GameBeep - Textures, Models, and Sprites for Game Developers

game-stuff.com
http://www.game-stuff.com/architect/windmill_1/02.jpg
(game objects - game levels)
Game-Stuff.com : Buy and sell low-poly 3d model for game (3d game levels, 3d plants, 3d buildings, 3d architects, 3d cars, 3d weapons, 3d characters).