How much an 1883 Confoederatio Helvetica Rappen is worth depends on its condition. The typical value of such a coin is 12 US dollars.
"Confoederatio Helvetica" is the Latin name for Switzerland. Your coin is not unusual and has an exchange value of about $1.10 as of 09/2012
The value of this Swiss coin depends on its circulation condition. It can range in value from 5 dollars to 30 dollars.
4 dollars
10~20$
You have a coin from Switzerland (The Helvetian Confederation, to the Swiss). Anything that new is almost certainly only worth face value. You didn't state the coin's denomination - an important piece of information - but exchange rates in early 2010 have been in the range of CHF 1 = US$ 0.90
less than a dollar
The value of a Confoederatio Helvetica 10 coin, which represents a 10 Swiss franc piece, can vary depending on factors such as its condition, year of minting, and market demand. As of my last update, the coin typically circulates at its face value of 10 Swiss francs, but collectible or uncirculated versions may be worth more. For the most accurate and current valuation, checking a reputable coin dealer or numismatic website is advisable.
One of these sold in an internet auction for $12.
It is likely worth a good deal, but that depends on the condition of the coin, and whether or not its authenticity can be proven.
You didn't indicate the coin's date, but assuming it's a recent coin you Swiss 5-franc piece only worth its exchange value of about $4.30 U.S.
The value of a 1934-b Confoederatio Helvetica 5 franc coin in mint condition can vary based on factors such as demand and market conditions, but it typically ranges from $10 to $50. Coins in pristine condition or with unique characteristics may fetch higher prices among collectors. For an accurate valuation, it's advisable to consult a coin dealer or a recent price guide.