The cost of a primitives 3D model for non-designers usually ranges from free to around $50, based on the source and whether basic shapes (cubes, spheres) have extra features.
Free options are common—use built-in libraries in tools like Tinkercad or Blender, or free sections on sites like Sketchfab. Paid models ($5–$50) often include commercial licenses, pre-adjusted settings, or curated quality for easier use.
For non-designers, start with free built-in primitives—they’re low-risk and ideal for testing without upfront cost.