She surely should have known better. Selling sea shells by the sea shore is a short sighted career path. Anyone can pick up the shells on the seashore, selling shells is simply silly, and she should see that. But each day she sets up her stand, sets out the shells, and sits waiting to see who will shop for her sea shells. No one does, of course, but she is certain she will sell some soon if only to sailors shortly setting sail. So sad, really, but she certainly does not seem to mind.
And the shells that she sells are authentic seashells for sure!
Actually the seashells she sells she ships in from the Seychelles