Statehood quarters are the most collectible current coins in the market. Error coins are the newest of the collectible trends. Combine them both and you got something special but is it valuable.
I found this in my change about a 2 years or more back. It is a South Carolina quarter 2000P with an off-center error.
When I first found it the only reference I had was the back of the U.S. Coins Red Book which at the time listed it at $150, today's Red Book has it for $175 but this is for 20% off center. I bought a guide book on errors and it showed how to measure your off-centerness. I estimated this coin at no more then 15% without being 100% sure.
Recently I stumbled upon a site http://error-coins.com/ that I could ask better experts than me to evaluate this and a copper dime. The site admin said this...
The South Carolina quarter looks to be about 10% off-center. It's worth around $50.I trust this judgment.
The copper dime is still an unknown error so I'll blog about it later when I can weigh it.
Back to error quarters there are 8 common types of error and depending on the state and rarity affects the value. If I chose to sell this the same time I found it I could have gotten more due to low reporting but as more are found the value went down. This always something to think about with error coins.
Here's the stats for a normal South Carolina P quarter....
Metal: 91.67% Copper 8.33% Nickel
Value: AU-50 $0.35 (AU=about uncirculated)