Oh, what a happy little accident that mis-struck nickel is! The value of a mis-struck coin can vary depending on the type and extent of the error, as well as the demand from collectors. I encourage you to reach out to a professional coin dealer or appraiser who can help you appreciate the unique beauty of your mis-struck 1984 US nickel.
It's the usual practice of this site to answer a single question at a time. Please see:"What is the value of a 1940 US nickel?""What is the value of a 1942 US nickel?""What is the value of a 1944 US nickel?"
Face value unless in original mint packaging.
This design is called either a buffalo nickel or an Indian head nickel; both names are about equally common. Please see the question "What is the value of a 1919 US nickel?" for more information.
The US nickel was first issued in 1866. Please double-check your coin.
This was a common circulation coin in Germany up till the changeover to euros in 2002. At that time it was worth about a US nickel.
5 cents.
A 1957 nickel is worth face value only, unless it's uncirculated or a proof coin.
In average condition, both coins are only worth their face value.
Check that coin again. The first U.S. nickel was issued in 1866.
Average current retail value is $5.00
This famous design is also frequently called an Indian head nickel. Please see the question "What is the value of a 1920 US nickel?" for more information.
Liberty nickels were made from 1883 to 1912. Your coin is a familiar Jefferson nickel. Please see the question "What is the value of a 1939 US nickel?" for values.