I always check unknown sites with http://www.resellerratings.com/. In this case, there's no listing there.

That's a good price on the spikes, especially considering they come with a threaded insert. I bought spikes awhile ago for an outrigger project and had a hard time finding suitable, HD inserts.

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::