What item of sports memorabilia sold for $4.3 million — a sports memorabilia record?

The original rules of basketball.

The two, signed typescript pages that set out the 13 rules were drawn up by the sport's Canadian founder, James Naismith, in 1891....

Naismith had written the rules to set up a new winter sport for boys at a YMCA in Springfield, Massachusetts, where he was a physical education teacher.

The school had given him two weeks to come up with a new sport and he finalised it the day before the deadline, pinning the rules on a gym bulletin board.

Oh, and by the way...

At the same auction, President Abraham Lincoln's Emancipation Proclamation, which declared the freedom of slaves held in southern states during the Civil War and was owned by ex-Senator Bobby Kennedy, fetched $3,778,500.

But that's not the original handwritten proclamation, which is in the National Archives. The Bobby Kennedy document is "one of 48 printed copies signed by Lincoln." Bobby paid $9,500 in 1964 for $9,500. Who knows how much of the $3,778,500 comes from the infusion of Kennedyosity.

Also at the auction, this guidon: