It features two male, two female and one kinda weird looking dude thing - see the preview.
These are really just meant as a starting point for a character - a few base meshes you can start from and sculpt to your liking. Or I guess in any situation where you just need a semi-realistic face. This is the reason why I set the price so low, although I personally prefer to sell as low as possible anyway.
You may notice from the renders that there is only one eye as well - same reasons as above, I really just put in the eyes as a convenience. It features a simple texture so it's really easy to change the color of the eye. It's also totally separate from the heads so you can turn it, scale it easily two.
One of the female heads is the only one featuring a neck and start of shoulder, all the others are heads only. The male with the plain looking face has a female counterpart - it's the only one of the five faces i didn't render (the female).
As you can probably tell from the renders, the female with the neck is the only one featuring a bit of a texture that adds some highlights to her base color and some lip coloring. The others are just colored with blender materials.
I've included blend files as well as obj in case you want to use the models as is in another program.