I'd try posting an ad on Craigslist. I found a dozen geese eggs offered for $6.00 (I only got 11 due to having to travel early for them), though most people posting were asking between $1.50 and $3.00 each. Ebay is another option if you are looking for something in particular. I ordered sebastopol eggs off ebay and had a good hatch. The ones I purchased from Craigslist are still in the incubator.