I'd say with humans, you should price it around 200k-500k, and for animals, charge 100k-300k.
If you want critique, your anatomy is slightly lacking, especially in the animals.
I am not very good at humans, so I can't give you much advice there, but on the animals you have in the example, the hind legs and the edge of the rump should be connected and lead around to the back leg, and the paws seem to be lacking details, like the different "toes" of the feet, and the claws.
(Sorry about that, I mean this to help you improve, and not to be harsh in ANY way WHATSOEVER! I'm sorry if I sounded like I was insulting your art at any minute! ;u;)
Would you mind pricing and critiquing my art?
I have a thread here:
tle="" href="http://www.rescreatu.com/forum/cat/arts/artgen/art-price-check-/%7Epage/1/">http://www.rescreatu.com/forum/cat/arts/artgen/art-price-check-/~page/1/