The most expensive national anthem sheet currently auctioned on the net is the sheet from Argentina which is an uncut x 4 anthem and flag essay with current value of US$2,500. Its is extremely rare and is a must for serious collector's. It surpassed the 1934 Czechoslovakia national anthem sheet which now cost around US$100-400.
The Argentine National Anthem (Himno Nacional Argentino) is the national anthem of Argentina. Its lyrics were written by Vicente López y Planes, and the music was composed by Blas Parera. This song was adopted as the national anthem on May 11, 1813, three years after the "May Revolution" (Revolución de Mayo); May 11 is therefore Anthem Day in Argentina.