Domain evaluation

Looking for free tool

[caughtintheact]

I'd like to find a site that will take a domain name and evaluate it for selling purposes. Anyone know of one?
This is not for my own domain, but for some research I am doing free.

[toolman]

[google.com...]

That might be a good start. I have no personal experience in this end of things...I was hoping someone who did might offer advice.