You could always check to see what similar work sells for on craft sites and similar places

wood on Etsy, a global handmade and vintage marketplace. carving&view_type=gallery

Folksy - Search results

A list of some other similar UK sites:
UK Sites Like Etsy

As for honest artistic feedback, Greenman is always good, the sitting men, standing man, theo and girl 2 are really good, girl kneeling one looks like she has a huge blister on her arm which is a bit freaky and I have no idea what is going on with the blue paint on top of your knots, is it a symbol with meaning that I'm not aware of?