Haha. Must be a package somewhere with 3 sets of legs.
Make one! There are plenty of plans online for observing chairs, in fact i built one some years ago, it featured an adjustable height seat.
This is the one I built:
Alright - after returning it and having a good laugh with the staff, I've now tested it and I can wholeheartedly recommend this as an observing chair. It compacts down quite small and the relatively flat. It will be very easy for taking in a small car for some dark sky time. Its comfortable and can the height adjustment is good. Also the foot rest is very adjustable if you wish to use it.