The most expensive banknote sold at auction is an 1890 United States $1,000 Treasury Note, which sold for $3.29 million (£2.6 million) at Heritage Auctions (USA) on 10 January 2014. The note is known as the “Grand Watermelon” note, due to the three...
A baseball was sold at Guernsey’s auction house, New York City, USA for $3,054,000 (£1,874,655) including commission, to Todd McFarlane on 12 January 1999. The ball was the one that was hit by Mark McGwire of the St Louis Cardinals for his 70th and final home...