(Photo from Sotheby's)

For three years now, the sprawling estate of Hall of Fame quarterback Dan Marino has sat on the market with nary a buyer.

As some frustrated home sellers are wont to do in this situation, Marino and his wife, Claire, are trying to sweeten the deal. This includes dropping the asking price from $15.9 million to $13.5 million, throwing in $1.5 million worth of designer furniture and a little something to remember from whom the house was purchased. (See the Sotheby's listing here)

Marino recently told the Wall Street Journal he'd leave a signed football for the lucky buyer. Because if anything is going to entice someone who can afford a $13.5 million home, it's an autograph.

In case you're interested in making an offer, the 15,000-square foot home sits on four acres in Fort Lauderdale, Fla. It has 10 bedrooms, 12 bathrooms and two powder rooms -- plus a pair of guest houses, a pool, putting green and a pond stocked with bass for people who love to fish, but hate the challenge it presents.