Finding Dishes for 802.11b Service?

toygeek2002 asks: "With the proliferation of 802.11b, plans like this one are popping up all over. Where is the best place to FIND such dishes? Numerous Google searches have led to dead-ends, and calls to some local satellite TV shops tell me I'm gonna pay a lot for a 2-3' dish. Where's the best place to find old Primestar or other such dishes?"