Well, you've got a few choices!   Buying eggs from BYC members is an excellent idea.  Also, you can buy chicks from breeders as well. 
 
One thing to do is, when you google (or search the web), look for breeder's clubs.  For example, if you love Wyandottes, looks up clubs in your state.  Ex:  "Wyandotte clubs in Ohio"  and often times, you can find breeders that are closer to you.
 
If you're buying hatching eggs, remember not to buy during times of extreme heat or cold, because it's bad enough that you'll have that risk of rough postal handling, but your embryos could be destroyed by extreme heat or cold.  Remember, the seller's ONLY responsibility is getting you those hatching eggs to you intact.  Once those eggs (or even chicks) leave the seller's hands, their responsibility ends. 
 
Lots of people buy hatching eggs and chicks that have to be shipped, and everything turns out fine, but you just need to know that there are risks.  Also, check the seller's reviews to make sure other buyers have had a good experience with them.
 
Take care and I hope this helped,
Sharon