 In order to migrate existing customers to DISH 500, DISH Network provides value-added channels in addition to local channels that can only be received with the DISH 500 and newer systems.Some of the channels exclusive to these newer systems are H2, Boomerang, Science, Planet Green, PBS Kids Sprout and Comedy Central.Tailgater is a portable satellite antenna; the tailgater can be purchased as a standalone device for $350.