MicrostockGroup

You can create this with every common 3d software. You need to learn how and you need to know how it looks the way it sells. Very easy...as everything what sells.
That's why everyone earns millions....very easy...

...YES, and to make glass, you only need sand.
Or to make Steel, you only need ore.
Or to make big Fotos, you only need a good camera.
Or to paint famous pictures, you only need a pencil.
Or to make intelligence, you only need brain mass.

You forgot 4. Create the good lighting vs shadow, white plane and background.
5. Use the right render engine (usually vRay for 3dsMax)
6. Use the rightcamera view.
7. Texture the model (pretty simple for those but... still need to be done).

Plus if you don't have the software, nor the renderer, nor the skills... Why would you take a week as a 3d newbee to create a picture to get .50$ a week for it?

I saw a gold human figurine with oval head on a store's window the other day. I suppose it would be much easier to have one and shoot it in many poses. At least, for me.