Sometimes yes, sometimes no.Can you get more $$ for the olive eggs at farmer's markets? lol.
You could sell dozens of just the olive eggs, or you could sell mixed-color dozens (some people like those.)
If you want to make your eggs visually distinctive in some way, so they do not look quite the same as the ones other people are selling, you could do some kind of predictable pattern (like putting 1 olive egg in each carton with 11 brown ones.) Of course, you would need to be sure the customers know that olive eggs are special, not turning green from being old or spoiled