I never accept PayPal e-checks. I want to send out the eggs right away, and e-checks take too long to clear. I have the eggs at the end of the auction, and I dont want them to sit around for 5 days before I can ship them. If somebody paid with e-check, when specifically stated "Do not pay by echeck", I would nicely ask them to change their payment, and if they dont want to change their payment, I would hold onto the eggs, and ship them after the check clears (3-5 days).
If they change their payment, they I would ship them the eggs right away, but if they pay by e-check when I state in the auction NO ECHECKS, then I will hold onto those eggs, and ship them once the payment clears. I think that is fair.