Look on the front of the coin to see if there's a small mint mark letter below the date. It may be blank or there may be a D or S.
Numismedia lists the following approximate retail values as of 03/2010:
No mint mark (Philadelphia):
Very worn condition - $0.14
Moderately worn - $0.29
Slightly worn - $1.50
Almost no wear - $10.50
Uncirculated - $15.60 to $104.00 depending on quality
"D" mint mark (Denver):
Very worn condition - $0.46
Moderately worn - $1.38
Slightly worn - $4.20
Almost no wear - $350
Uncirculated - $61.20 to $273.00
"S" mint mark (San Francisco):
Moderately worn - $0.63
Slightly worn - $0.98
Almost no wear - $22.60
Uncirculated - $48.00 to $624.00
There were 196,429,785 coins minted at the Philadelphia mint in 1917. Since the mint mark is below the date, you would have seen one if there was one and stated so. So it is not a rare coin. In grade good it is worth .10 and up the scale to extremely fine it is worth $3.00. It is not really valuable, but is a collectors item. Now there is a variety of this date 1917, that is a doubled die. It is worth some bucks depending on grade. Your chances of having one is slim, but not impossible. Look at the date with a 10x magnifier if it has a doubled date or there are lines on the date you have a winner, but only if you take it to a coin dealer to have it authenticated by a grading service, this will cost you, so see what the dealer has to say first. He should have a microscope and can tell, if it is worth sending in.
There are a number of factors that go into determining what a coin is worth. The value of a 1917 one cent Lincoln coin is worth $18. If it is a 1917 D it is worth $90, and a 1917 S is worth $130.
Average value is 25 to 50 cents. The 1917 Lincoln (Not Head) cent is a high mintage, common date.
1856 3 cent coin value
About 1 cent.
It's still worth one cent US.
There are a number of factors that go into determining what a coin is worth. The value of a 1917 one cent Lincoln coin is worth $18. If it is a 1917 D it is worth $90, and a 1917 S is worth $130.
1 US cent has the same value the world over! i.e. 1 US cent
Average value is 25 to 50 cents. The 1917 Lincoln (Not Head) cent is a high mintage, common date.
1856 3 cent coin value
About 1 cent.
It's still worth one cent US.
A 1917-S Lincoln in VG-8, has an average retail price of 50 cents.
A 1997 US one cent piece? is a Lincoln cent and only face value.
It's worth exactly one cent.
A 1942 US Wheat cent is common, average value is 3 cents.
There is no such thing as a "wheat head penny". Assuming you are referring to a 1917 Lincoln cent, its value depends on its condition and mint mark. See the Related Link for "Lincoln cent prices" to the right. In circulated condition, you'll get about 5-10 cents for it.
The coin has face value only.