high demand. It comes with a hard lid and a few other features only on the Ace model. Some post it's on special for $299. I couldn't find it in my area.
I have the 22" Adventure 2 burner model, got it for $179 at Walmart. For a short time last month, they were blowing them out for $99 (missed it). It too has a hard lid and comes with a foldable stand for transport. Many don't come with the lids, and they're expensive to add. I got mine for use with the travel trailer.
I think if you are going to use it for your home, go with the biggest you can fit.