What is the value of an 1867 US quarter?

1867 is one of the less common dates for Liberty Seated quarters. Look on the back of the coin to see if there's a small mint mark letter. It may be blank or there may be an S

Numismedia lists the following approximate retail values as of 03/2010:

No mint mark (Philadelphia):

Very worn condition - $190

Moderately worn - $489

Slightly worn - $930

Almost no wear - $1,404

Uncirculated - $1,740 to $19,380 depending on quality

"S" mint mark (San Francisco):

Very worn condition - $230

Moderately worn - $980

Slightly worn - $1,530

Almost no wear - $8,302

Uncirculated - $14,380 to $20,630
An American quarter from 1867 is known as a "Seated Liberty" quarter. It is about ninety percent silver and is generally worth a hundred dollars in poor condition but can fetch several thousand if it is of good condition.