there are some questions you need to ask herself before your question can be answered: when was it made how long have you had it and is it rusty. so there's not enough information for me to answer...
Nickel silver is a copper alloy...60% copper, 20% nickel, and 20% zinc. The name comes from its color and appearance. So....it is worth more as scrap metal than as a "precious metal". Sorry!
The only nickels that ever contained any silver were the so-called "war nickels" minted from 1942 to 1945. They're distinguishable by the large mint mark over the dome of Monticello on the back....