Check your local Craigslist or livestock auction. Sometimes the latter sells birds. The one I go to here has them every week. Warning, though - the days of cheap pigeons seem to be over. I've seen them go for as much as $12 ea. I refuse to pay more than $6. We've got one guy who is at our auction about every week and he tries to buy every pigeon available. He's made a business of reselling them for live pigeon shoots. I hear he's gotten as much as $20/bird from those shoots.