EDIT: I went and bought one XD thanks!
The item can be bought/sold/traded etc so yes xD it can happen. I'm not sure if we're able to find multiples or not. But you can try borrowing the egg from someone? See if that works, since Esther doesn't actually take the eggs from you.
Oh. Derp. XD I didn't realize that. Well...thank you for telling me. XD