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1. Which of Banksy's artworks will auction at Julien's Auctions on June 26?
A. Mariachi Player
B. No Ball Games
C. Mobile Lovers
2. Who wrote the Titanic letter that sold for a record $200,000 on April 27?
Image: Henry Aldridge & Son
A. Benjamin Guggenheim
B. Esther Hart
C. Leonardo DiCaprio
3. How many Gomz Leningrad Space cameras were made by the USSR in the 1960s?
4. How much did Orson Welles' movie camera sell for?
5. When was the Australian "Roo" stamp first issued?
Image: Mossgreen Auctions
Answers: 1A, 2B, 3C, 4C, 5A