Hayden owes Luther $5000. Hayden will only be able to pay this debt if he is able to sell his one-year-old Harley motorcycle, valued at $20,000. Hayden writes a check to Luther that reads, "Payable to the order of Luther the sum of $5000 as soon as my Harley motorcycle sells for a reasonable amount." Is this check negotiable? Explain the rules of negotiability in your answer.