I could see a studio paying that much for what you've done with it so far, although your animation link is a bit misleading - as I thought I would see 'THIS' Mech being animated, which it is not(nice sequence though) - since it is rigged but doesn't have any animations. But, since any studio purchasing it would normally make their own anyway...
You should also post a few shots of the rig so it shows what it's capable of(other than flying, shooting missiles, and picking stuff up and throwing it!), along with your documentation specifying special attachment specs, ie. jets, thrusters, & weapon accessories(since it has mandibles instead of built in weapon appendages) etc..
I also didn't notice any battle worn textures that would accompany the download, only dirt textures - which don't really show wear & tear, only muddied up a bit. So, that means the purchaser would have to make their own textures showing worn or damaged conditions.
With the obviously long hours you spent on this for building and presentation, I am surprised you didn't post the man hours involved with making it? And if you happen to have any tutorial links handy, I'd love to see how you made it!
Thank you very much for clever comments, I'll really consider things you said for the following models.
For the inital model that is on the animation is single day of work,(for modeling, materialing(no uv or textures) and the cat rig) but I do a lot of kitbashing(reuse what is available)
For the turbosquid version I remodeled everything, making a newer release of the robot which is more armored and less messy this time, also I used more futuristic jet body on top and more futuristic machine gun design but I had modeled the jet body a year ago so I kitbashed that too... For turbosquid model work hour is relative cause I spent time on remodeling and remodeling some parts which I wouldn't do on production envorinment, I think 3-5 days should be ok for this model(which I think is still too long)
I'd love to write tutorials about that but currently I'm a bit busy, maybe hopefully in future.