Good deal on this grill- i.e. what you should be paying. In another life I assembled these, and they are not too difficult. Will also last a little bit longer than some of the lower quality big-box home store models.
I picked up one of these last go round - works like a champ and you can get the side firebox for around 55$ at the Mothership. No stainless on it but if you coat it with oil and run hot once in a while - it should hold up
I got this at Lowes a couple years ago for a touch more money, as well as the side charcoal box. For my needs, I love this grill! (Get the cover - it helps)