As one of its daily deals, 5StarDeal offers the EZ Cracker Egg Cracker and Separator
, model no. 82-9048, for $5 plus $2.99 for shipping. That's the lowest total in-stock price we could find by $5, although it was $2 less in January. This allows you to separate egg whites from the rest of the egg, or egg shells from hard boiled eggs. Deal ends today.
Update: Even better, BestStopDeals via eBay has it for $4.98 with free shipping.