What is the value of a steel penny?

Answer 1

Steel cents were struck in 1943, during the depth of WWII, because copper was needed for the war effort.

There's more information at the Related Question.
It really depends on the condition. They are worth about 5 cents if in average circulated condition and have nearly all the plating, only about 2 cents if there are any spots of rust on the coin. The mintmark really doesn't make much of a difference, though the "S" mintmark is the least common of the 3. If the coin is in uncirculated condition, it might be worth about a dollar or two. Beware though, some coins have been replated by private individuals, these coins have no collector value except for 2 cents or so.