As others have clearly noted, you can place yourself in a position to act should the existing buyer fail to complete the purchase.
I would caution parking the 'Fight For It' attitude where it can not be seen.
A seller and their agent will consider a PIA buyer the last thing they need in this stressful event. Back up #3, will appear more attractive.
Position yourself correctly for this home.
Have your agent plug you into the early look process. (If you are 'fighting' your REALTOR, you may not be allowed access)
Be decisive and get your offer in FIRST.
Best of success,
Annette Lawrence, Broker/Associate
Remax Realtec Group
Palm Harbor, FL
Palm Harbor University High School distirct