What is the reason that you want to sell the coins?
I regret not having some coins now that were given to me by people who are no longer around.
I would not be in a rush to sell any gold coins.
Was any information provided with the coins?
Are the coins in holders or just loose?
If in holders, are there any information on the holders?
If loose, then you need to handle them very carefully, holding them by the edges only.
The first thing to do is to inventory the coins.
Sort the coins by country, then by the face value of the coin, and then by the year.
US coins can have mintmarks. Most common being P, D, and S. Other ones were used as well such as W, CC, and O.
Some silver coins can be worth more than 9x the face value of the coin based on the condition, number made, etc.
From the list, we could tell you which ones might be worth something.
We could advise and ask if pictures can be supplied.
From the pictures, we could give a better idea of the possible value but sometimes pictures do not show stuff that might made the value lower. Having a coin in hand and looked at by a person who is fluent in grading that type of coin is the only sure way.
Others will also offer advice.
Stick around, ask questions, tell us what you have, and remember, we live pictures.
Need to be careful, as to who knows you have coins, hate to see you being robbed.
Ken
PS Welcome to the forums.