On Monday the book on top sold with a profit of $3.
On Tuesday, the 2nd book sold with a profit of $3.
I thought, Maybe I should put a more expensive book as the 3rd book in the pile so I can get more money. It was just a joke, so I didn't move the books around. Wouldn't you know it - today the 3rd book in the pile sold!
I mailed all 3 books today and will earn $30 after fees. I chose not to pay for insurance ( a savings of $3.75) and I hope I don't regret it. 2 of the remaining books are more expensive than these first 3.
I should look for free books more often on Amazon - especially textbooks.