That seems rather cheap for the amount of hardware and technology. A foldable smartphone costs the same, and the only novel thing it can do is... fold.
Like the other comments mentioned, that's shockingly cheap.
Amazon is selling their ridiculous Astro bot for $1,599, and it can't even do *gaps. (I don't think this can do stairs, but definitely handles elevation changes)
Since it comes with LiDAR, I thought it was very good value.