Graphics for fantasy-themed browser MMORPG

The project is to design graphics for the fantasy-themed MMORPG we have in development, mostly consisting of small 64x64 images; the game will be played on a tiled map (64x64 size of each tile), so we need small images of buildings (towers, castles, economic buildings such as lumber mills, farms... dungeon entrances, etc.), resources (herbs, ores, ...), player equipment and similar; also few (3-4) large images may be needed (for the game's main page, character's "doll",...). For most cases we should be able to provide a sketch of what we need; if you have experience of playing online browser MMORPGs, it should greatly help to understand what graphics we're looking for. <br> Since the project should require large number of small images, we can agree to select a designer for a separate branch of project (for example, for character models), creating separate bid request. <br> Soon we'll upload sketches of required images there; for now, if interetsed, please inform what images you can design, how much you would charge per say ten 64x64 images, and, if possible, show samples of your work (can be anything fantasy-themed or game-related). The project is expected to be large and long relationship, so the winning designer may expect to get invitations to further graphics projects for our game.