domain Please Appraise testweld.com, operatorunion.com, motoins.com, futuregrain.com

[crane]

I would very much appreciate any feedback on these domains. Also has anyone had any luck with contacting a business that may have a use for a domain? Or is this considered improper etiquette?
The figures from Google Adwords traffic estimator for these are-
testweld 260 one word 4400 two words
operatorunion 0 - 2900
motoins 165,000 - 140
futuregrain 0 - 390
So just because futuregrain is low I think it could still be of value couldn't it? Let me know what you think. And thanks in advance...

 

[johname]

The only two grabs at me testweld could make a nice little how to make a sound weld and do a proper destructive test on the joint site. But might be already done to the hilt by people of great experience and cerification. low-mid xx Motoins.com could be a grand sleeper very hard to value, a xxx use or sale is not at all speculating in my opinion. Goodluck