Yah, I guess so.  He is way out of my market though.  But I am still jealous because he has a huge source of potential rehab grills all within a half hour of him.
I did sell my last one to a guy from Jefferson, WI which is about 70 miles or so.  Actually, he bought two grills.  He grabbed a Q100 as well.  
I would like to see photos of one of his grills (inside) to compare to mine.  And I have never sold a grill for $300.  The most I have charged was $225 and that was my last one with new SS grates and flavo bars, so even if I our customer base overlapped, I think I could hold my own.   I do have a couple newer Genesis E310's waiting for my attention and they will likely go for more than most of my other grills.
Oh, and I don't know if I would buy a grill from him.  It looks like he is running his off real GAS (unleaded) instead of propane.  Take a second look at the photo in the add.