Most people aren't going to want to buy just a head, more so if it's not retopped. as trying to animate with a raw sculpt is a fucking nightmare.

There's some male and female attributes you're mixing here as well, such as the eyes and lips.
The cheek muscle that goes over the nose blends into the middle rather than trying to work its way over the crease of the bridge.
This is actually a common mistake with noses actually, people are trying to model out the levator muscles when it's the nasalis that's making the cheek to nose crease.

You've got a lot of the micro details a lot of people miss like the upper eye folding over the lower, and positioning of jaw to ear.
Keep up the practice :)