Good price - I found a single set (one leg/base/etc) on Overtons of all places for $50. For comparison, Garelick set is $140 or so.
Looking at this one, I'd say that for the same sturdiness as Garelick I'd need two of these - but that's still only $100. I guess Garelick is going back
Also, it appears that there is no special hardware on the top of the post so longer posts can probably be just cut to size, they aren't tapered or anything.