I didn't want to quote Opentracker's $175 price, but since he's done so I'll chime in that this includes shipping, and that I'm very happy with the service. Once I mailed him a money order (available at every 7-Eleven on the planet), the perches arrived within just a few days. They look great. I haven't installed them yet -- they have joined the Slide-A-Links/Fays2/4-wheel spring swap/T-5 swap/Baer-Tracker combination project piled high in my garage -- so no road test yet. But as of now I would recommend Opentracker roller perches to anyone.