Question: coins are the most valuable?
Answer: 1804 Silver dollar, Class I ($4.1 million) ...  2007 C$1m coin ($4.1 million) ...  1343 Edward III florin ($6.8 million) ...  1787 Brasher Doubloon ($7.4 million) ...  1907 Saint-Gaudens double eagle ($7.6 million) ...  1933 Double eagle ($7.6 million) ...  1794/5 Flowing hair silver/copper dollar ($10 million)