Yes, this price is pretty ridiculous.. I spent more money on bolts and accessories than on the pier itself (well, to be honest, a friend gave me this steel pipe because he didn't need it).
I was actually contemplating the concrete pier (it is cheaper in principle) but this pipe turned up so... and since I intend to move to Seymour anyway.. the concrete slab only is easier to remove (from sight by simply growing a grass over it
)