I've left even store bought eggs on the counter for several weeks with no deleterious effects. In actuality it's hard to find non-washed farm fresh eggs at all... even local egg producing folks usually spray them off to remove any appearance of yuckiness before they sell them to friends and neighbors. You really have to specifically ASK them BEFOREHAND NOT to wash them in any way at all. When I've done this, I've been met with resistance - alot of them don't want to handle or dispense eggs that may have a little poop on them. lol
Talk to That Girl and others like her. People that have a few ducks and chickens that lay more eggs than they can eat. Heck if Edmond was not so crazy I would have half a dozen hens.