What is the value of an 1877 US 1 dollar gold piece?

Numismedia lists the following approximate retail values as of 07/2012:

Very worn condition - $138

Moderately worn - $180

Slightly worn - $240

Almost no wear - $492

Uncirculated - $660 to $16,560 depending on quality

DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.