Which of the following situations does not contain a mistake that a court would review?

1. Both parties do not know the subject of the contract has been destroyed.
2. Both parties meant to have the property sold for $1000 but a typo made the price $1.
3. Both parties do not know that the property to be sold is already owned by the buyer.
4. A person sold a valuable antique for little money.
5. Both parties use the term "COB" but have different definitions and the term is used to determine deadlines.