Insane these are not popular in the states, they've almost taken over the market in China.
They're only available online from a very few companies and very expensive stateside.
I didn't bring my tent back to the states , figuring I could pick one up at North face or the like and was pretty surprised and frustrated when I couldn't find a single affordable pop-up in any sports or outdoorsy store.
I was in Colorado at the time, too, so there were plenty of places to look.