Trade Silver Coins
First of course you need to be absolutely sure about the value of the silver coins you currently own.
If they come with a certificate of authenticity that is excellent as it establishes the worth of the coins
If you think you may have a valuable coin(s) it is worth while getting it appraised and the value certified.
The next step is to find an outlet to sell or exchange or trade your coin(s).
This could be an auction site or a site specifically set up for trading coins.
The next step is to study the coins being traded so you are fully familiar with the types of trade going on and what cons are traded for what. It is easy, if you do not have much experience, to trade down instead of up. That is to say you trade a more valuable coin for one of lesser c\value. Ideally you want to trade a coin for one of equal or more than the one you are trading.
You may not necessarily trade up but if there is a coin you are specifically looking for, perhaps to complete a collection that will be worth substantially more by virtue of being a complete set.
In that case it may be worth while to trade down.
Then you offer your coin for a trade. Of course specifying what coin you would like in return.
This can be a worth while exercise, especially if it helps you to complete a set you would otherwise not be able to do.
Sometimes you can wait ages to complete a set and this might be a faster way of doing so.
There are some distinct advantages to being able to trade silver coins and this is the best way to go about it.