The most expensive Canadian cent is the 1936 DOT, it sold at auction for $402,000 and there are only 3 known.
I will add a link to the auction when it sold in January.
The most valuable ones are the 1943 copper penny, and the even more rare 1944 steel penny.
As far as general circulation coins are concerned, easily the most valuable Australian Penny is the 1930 Penny and the most valuable Halfpenny would be the 1923 Halfpenny.
probably the 1857/8, 8 over 7 flying eagle can be worth millions
A 1943 penny made of copper that's worth $20-40k circulated.
The 1964 Lincoln penny is unfortuantely worth 1 penny. This was not a key date amongst pennies. Most valuable pennies were wheat and Indian head cents dating from 1859-1958
About 5 cents. Steel cents aren't as valuable as most people think.
1937 penny
the most valuable is the penny in the us has a head on the front and back hope this helped :) :) :) :) :)
The Queen Victoria, penny-red, plate 77, one penny stamp.
The rarest and most valuable Lincoln cent that isn't an error is the 1909-S with VDB on it. The rarest and most valuable error Lincoln cent is the 1943 copper penny.
The 1909-S V.D.B.
1970-S