Try checking the ANA Dealer Directory here : http://www.money.org/ana_custom/dealer_search/
coin dealer in spansih is: distribuidor de moneda
If you are asking about how to get a dealer to buy your coin that shouldn't be to hard. Take it your nearest coin dealer and see if he/she will buy the coin. If they don't take it to another dealer or put it on eBay. If none of these work take it to the bank where they will give you a dollar for it.
Take it to a coin dealer
A professional coin dealer or a professional coin grading service can determine if a coin is circulated or uncirculated. They will assess various characteristics of the coin, such as its condition, surface quality, and wear, to make this determination.
Try a coin dealer, coin show or collector.
Take it to a coin dealer.
There are many companies and individuals which deal in coins. A professional coin dealer is also known as a Numismatist. Buddy Ebsen is a well known coin dealer. Also, Guy Araby is a well-known coin dealer serving Los Angeles and Orange County.
go to a coin dealer or the bank. The coin dealer will pay more. the bank will only pay face value.
Try a coin dealer or take it to a coin show.
Go to a coin dealer or a jeweler, they have tests that will verify if the coin is gold or not.
If you doubt the authenticity of any coin, take it to a coin dealer.
If your not sure if a coin is genuine take it to a dealer or collector for their opinion.