Gaming Heads statues rarely sell out while on pre-order. I think it is because people are not so confident with what they will make. Some of their statues had a bad paint job in the end. (the Keeper, Lara Croft survivor, Tali for example)
I think people prefer to see how the final product will look before buying.
Have you joined the gaming Heads collective on facebook? They sometimes show updates on their products.
Like this one:
https://www.facebook.com/groups/1699...xpY2tlcg%3D%3D
Looks great to me.