That's so awesome! and it is a collectible.
I imagine little kids digging through the cereal box to get their real property deed!!!! They should bring back the toys in cereal. j/s
From newstimes .com 2 years ago it was worth 2 to 30 dollars:
"Your deed was issued in 1955 as part of a brilliant ad campaign dreamed up by Quaker Oats. At the time, it was sponsoring the popular radio and TV show, "Sergeant Preston of the Yukon." A deed to 1 square inch of Yukon land was packed inside every box of Puffed Rice and Puffed Wheat. An estimated 21 million deeds were printed, but they were all a sham. The Klondike Big Inch Land Co., apparently a Quaker Oats subsidiary, was indeed registered as a corporation in Illinois, where Quaker Oats is still headquartered. But the individual deeds were never registered and the 19-acre plot of land involved, originally purchased by Klondike for $1,000, was repossessed by the Canadian government in 1965 for nonpayment of $37 in property taxes. But the deeds have become collectible. We have seen them selling online for $2 to $30 apiece."