Should there be concern?

  It is a red flag. elevick is right...report this "seller" to Audiogon's administrator ASAP

I notice lots of ridiculous post suggesting new, then on the other end states limited use or low hours. If the box is open, its used! The buyer wouldn't know if its low hours or a millions hours. 

"If the box is open, its used!"  Couldn't agree more.

I've been really lucky buying and selling on Audiogon, but I hear from others about that occasional person like the one you described.  Life's too short to deal with people like that.

The only "problem" I've had, selling items, is that I once had a guy who lived fairly local, we communicated via Audiogon email, he called me to ask some questions, we agreed on a price, he shows up at my home and the first thing out of his mouth was that he thought about it and reduced his offer by $600.  I told him the deal was "off".  This guy wanted to see the unit I was selling, after reducing his offer...no way!  What I learned from this was to demand that a buyer make a formal offer on Audiogon, no problem communicating via email, but the offer and payment had to be done thru the site.  Just my 2 cents.

Thank you for your replies. Been doing business for quite some time here on audiogon and had all good experience. This is really the first time I was exposed to this type of issue. After playing around on the selling side I'm finding quite a few ads which I would question. Whatever happened to truth in advertising?  Let the buyer beware.

After many good transactions finally had a bad one.  Seller rated as mint. I found a total of 5 defects.  While we renegotiated this to closure, what a pain this was!

Yes, there is more overrating now than before.  There is a similar post from 3 weeks ago on this issue.