It is definitely worth zero, even if you sell it one day to an attorney. How do I know this? That is an easy question. List it here in a sales thread and you won't get any price. At Dn Forum, the most knowledgeable domainers on earth either lurk here or post here. So, you have the most knowledgeable people on the planet concerning this product. And they won't give you 10 cents if you put it in a thread. So, that is the answer.
You mention Google searches and a suggested bid, as if that is supposed to mean something. It means nothing. It is like trying to convince a supermodel that you are a good candidate for a date. You could say: "Hey, I am a human being like Tom Brady. And Tom Brady married a supermodel, therefore, I believe that you should go on a date with me".
The name sucks, and you know it. Nobody is knocking down your doors for it, I'm sure. There are over one million attorneys in the United States alone (1.2 million as of 2011), and not a single one of them feels that they NEED this name, or else they would have contacted you. I used to own NantucketAttorney.com as well as many other decent names. The names are so great that I could email an attorney in Nantucket with an incomprehensible website name and not even get a response. Couldn't give the name away for any price. Sure, there are occasions when a legal name will be sold for good money, but it better be a name that someone NEEDS. In other words, it has to somehow be able to drive business to the purchaser. So, it needs to have traffic, or be a strong term that is dotcom, and even then, you would be surprised at how often decent names cannot draw offers of any kind. Not even $50.
MesotheliomaAttorney.us cannot reasonably be expected to improve anyone's business. Period. I mean, no more than MesotheliomaAttorney.whatevergarbageextension could reasonably be expected to improve the cash flow of any law office on earth. The name is worth less than you think. Combine those words and it is worthless. The moment you spent 30 minutes thinking about it, and putting it into this thread, is the moment you have dug yourself a hole that you will likely never get out of. If you think for a moment that because MesotheliomaAttorney.com sold for a nice amount, that you could draw up some formula where the .us version has to be worth a certain percentage of the dotcom, then you are way off base. People used to try that dumb logic by saying that .nets were worth 10 percent of dotcoms (cackle cackle cackle cackle cackle cackle).
Dotcom is king. There are numerous reasons why this is the case. There are certainly many names that are not dotcom that are worth good money, but this isn't one of them. If you look at the history of UDRP disputes, how many people on planet earth have ever filed a dispute to stop someone from using a .us name? It is such a sucky extension, that even trademark holders don't care who registers them. It is the equivalent of having an Associates Degree from a community college and applying for a job at Google going up against a Stanford graduate. They just aren't valued in the same universe by those who have the power in society. Reality, reason, and logic always wins in the end.
People who know better continue to clog the appraisal section with loser names. They are begging for someone to hold their hands and tell them how valuable their names are. The names usually being ones that have never received offers from one of the 7 billion inhabitants of planet earth. It is stunning how many people list these types of names here. These same people wouldn't buy the name themselves for any price, not even the cost of a lunch, but they want others to tell them that it is worth real money. And people appraise these names at anything from XXX to X,XXX and higher, yet those giving the appraisals would not even offer a fraction of their appraisal if they were forced to buy the name.
Crap. Garbage. Waste. Loser name because it's a loser extension. Anyone who appraises at any amount should be prepared to pay even a fraction of that amount, like one third, or else your appraisal is fraudulent.