Just thought about this, on your promise page, how about tell people a bit about how you package the eggs. That you bubble wrap and tape each egg to insure their safety during shipment. Instead of just saying that you're not responsible for broken eggs, let them know that because of the way you package them you don't expect any broken eggs.
People need to feel safe in their purchases. You can still say that you're not responsible for broken ones but give them the peace of mind that you are confident in your packaging skills that they won't break.
Just an idea.