Most expensive pen: $265,000

Swiss company Caran d'Ache made 'La Modernista Diamonds' a pen that was sold in Harrods, London, for $265,000. Created in memory of architect Antonio Gaudi, the rhodium-coated solid silver pen has an 18-karat gold pen point and is pave-set with 5,072 diamonds and 96 half-cut rubies.