I do 3D modelling (organic and technical stuff) from jewelry over cranks & wheels to ships and aircrafts... just about anything that human can manufacture (in low-poly). I usually sell raw 3D models w/o textures, but that also must not be the rule if a customer insists. Models can be sent as *.obj or *.3ds files.
If you decide to hire me, it is desirable to give precise and specific instructions about what you expect as a result, so that any misunderstanding could be easily avoided.
If any kind of complaints should occur, I can assure any potential buyer that I'd be more than happy to fix it as soon as possible.