I use a Weber Genesis Gold (natural gas model) about twice a week year-round, and only recently have I had any problems, only thing that has gone wrong with it is the ignitor has rusted out, and just last week I noticed the steel liner for the lid is rusted out on the bottom back of the lid, allowing it to come loose. I have not checked on parts or price for them yet.
Be aware I NEVER have used the side burner, but I have one...just have no use for it. The stainless burners, grates, and flavorizer bars are nice though.
Dang thing was 500.00 though 3 years ago...I would have NEVER paid that for a gas grill for myself, the people we put up that lost everything in Katrina bought it for us...
That being said the Weber is the finest gas grill I have ever grilled a steak on. Hands down. Even heating, as well as precise temp control, compared to the other grills I have had over the years.
But your floor model seems like a great deal, I think I'd jump on that. :up