State Quarters were released from 1999-2008, each representing a US state.
Some quarters are worth more due to errors, low mintage, or unique designs.
2004-D Wisconsin Extra Leaf Low: Look for an extra leaf on the cornstalk.
2004-D Wisconsin Extra Leaf High: A similar variety with the leaf positioned higher.
2005-P Minnesota Doubled Die: Check for doubling of the tree outlines.
2005-P Kansas 'In God We Rust': A printing error worth looking out for.
2000-P South Carolina Off-Center: Misaligned strikes can increase value.
1999-P Delaware Spitting Horse: An error where the horse appears to spit.
2006-P Nevada Pooping Horse: A die break causes an extra metal piece on the horse.
2007-P Wyoming Double Die: Look for doubling on the saddle horn of the cowboy.
Always check your change; you might find a quarter worth more than face value!