Three scanned, posed 3D people to try before buying a set: a woman in business clothing, a woman and a man in casual clothing. They are full-quality files, not reduced previews.
Each download contains the model in 3ds Max (V-Ray materials), Cinema 4D (V-Ray materials), SketchUp and OBJ with textures, so you can check import, scale and material setup in your own application before buying a set of 8.
The paid catalog has 66 models: sets of 8 people for $50 (business, casual, sitting, spa) and single models at $19. All are the same scan quality as these three. Start on the 3D people overview.