What is the value of a US 1865 quarter dollar coin?

Numismedia lists the following approximate retail values as of 05/2009:

No mint mark under the eagle:

Very worn condition - $71

Moderately worn - $150

Slightly worn - $330

Almost no wear - $600

A nice uncirculated one could sell for $950 or more.

"S" (San Francisco) under the eagle:

Very worn condition - $100

Moderately worn - $265

Slightly worn - $360

Almost no wear - $1200

Uncirculated - $3000+