Seems like this is not an easy hobby .. Lol. I'm up for the challenge though.I think there’s a lot of variables when it comes to eggs too. The age and health of the parents affects the viability of the egg. Shipping on top of what could be mediocre eggs to begin with along with the temp fluctuations during shipping and the odds are against you lol
The problem with buying a pair id think would be you’re more likely to get a brother and sister unless you paid quite a bit more. Of course you’d never know til they started falling apart after a few generations and even then it would just be a guess.
One more question if you don't mind. What time of year that you know of would be best to try and order eggs? I can imagine their being many variables. ..