Looks more robotic than anything, but I will be selling this so how much do you guys think its worth? Also CC please!

Is it just WIP? If not, then it really needs shading and coloring of the grey parts. However, it has got a big potential and you can make really good head from that.

I did finish, but I can work on it still, ill try to color the grey more with a shine.

it needs more shadding, glowing effects would be nice, and try to make darker grey parts.

I worked on it some more, updated the first post. Should I add pipes to add some depth?

not bad try to add eyes and some details like wires or airintakes idk :P
overall: 7/10 by now

I think you need to make the eyes stand out more and add a bit more detail,

Overall: 6/10

Too crowdy, no shading..
6/10..