I can tell you a few things I don't like to see as a customer -- 1) no dirty eggs -- a few specks are ok, but nothing coated in layers of poo and dirt. 2) Don't just wrap them in a single layer of newspaper or paper towel and thrown them into a box with a little crumpled newspaper. Someone did that to me this spring with goose eggs, not once but twice, the second batch as a replacement for the first batch that was so poorly wrapped AND coated with poo. When I confronted the vendor in an e-mail, she admitted that she didn't even gather or wrap/package the eggs, she made her 14 year old son do this chore and he hates doing it -- so obviously doesn't do a good job, just wants it over with. 3) If for any reason there will be a delay or other problem, please be proactive and let the customer know up front. The vast majority of people will understand. Don't hide and ignore e-mails that are becoming increasingly frantic because someone paid for eggs and now no one is shipping or responding.
Good luck. It's really not rocket science -- basically, as stated above, use multiple layers of protection. Personally, I prefer the "box within a box" approach with shock absorbing materials in between.
