Question: what year error coins are worth the most?
Answer: 2005 U.S. Filled Die Kansas State Quarter. ... 
2007 U.S. Missing Edge Lettering Presidential Dollar. ... 
2012 U.K. Olympic Swimming 50p. ... 
2000 Australian $1/10 Mule. ... 
1999 U.S. Wide "AM" Reverse Lincoln Penny. ... 
2009 Lincoln Presidency Cent. ... 
1995 U.S. Doubled Die Obverse Penny. ... 
2002 Italian 2 Cent. Sold at auction: €6,600 ($7,564)