What is the value of an 1845 US 5 dollar gold piece?

Answer 1

You probably have the Coronet type which was is from 1839-1866. Look on the back of the coin to see if there's a small mint mark letter below the eagle. It may be blank or there may be a D or O.

Numismedia lists the following approximate retail values as of 12/2014:

No mint mark (Philadelphia):

Very worn condition - $432

Moderately worn - $500

Slightly worn - $525

Almost no wear - $678

Uncirculated - $1,810 to $16,060 depending on quality

"D" mint mark (Dahlonega, GA):

Moderately worn - $880

Slightly worn - $1,190

Almost no wear - $4,014

Uncirculated - $9,060 to $78,000

"O" mint mark (New Orleans):

Moderately worn - $500

Slightly worn - $630

Almost no wear - $3,932

Uncirculated - $10,940 to $33,150

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.