Although the Australian 2 cent coin was withdrawn from circulation in 1994, they are still legal tender and are worth 2 cents.
There are two Australian 2 cent coins that are considered to be valuable, the 1967 and 1968 coins, both minted at the Perth Mint. What makes them valuable is the missing designers initials (SD) below the lizard and to the left of the front right claw.
These coins are no longer in circulation, but unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 1 cent. The most valuable Australian general circulation 1 cent coin would be the 1968 coin which, uncirculated and in absolute mint condition might fetch up to $28 AUD. There were 19.93 million minted. A reputable coin dealer will be able to give a more accurate valuation.
it has no value and is by far the most rare
No general circulation Australian decimal coin could be considered to be valuable. Any 1981 coin in absolute pristine mint condition might get $2 to $4, otherwise, they are worth face value. There is one variation, the 1981 20 cent coin minted at the Royal Canadian Mint Winipeg, shows the platypus with three and a half claws. These may have some collector value.
All 1966 Australian 50 cent coins were minted in Canberra. They have the distinction of possibly being the most hoarded coin in Australia.
No, they are not especially rare. There were 36.252 million issued. They have the dubious distinction of being the most hoarded Australian coin, since they were removed from circulation in 1967 after the price of silver skyrocketed. The next 50 cent coin issued in 1969, was made from cupro-nickel and had 12 sides, as have all Australian 50 cent coins since then.
The 1943 coin is about $3 at most. The 1951 coin is about $1 at most.
The Two Dollar coin was the most recent addition to Australia's circulating coinage and had to fit in with, and be distinguished from, 7 existing types of circulating coin. Circulating coins are no longer made of precious metals, so there is no longer a need to make them to any particular size for any particular metal or denomination. There was also a need to consider the visually impaired. The Two Dollar coin is slightly larger than the 5 cent coin and slightly smaller than the 10 cent coin, and significantly thicker than both.
After the abolition of the Guilder, the new most valuable coin would be the 2 Euro coin
The most valuable and desireable Lincoln cent is the 1909 S VDB coin. If you have a 1909 S minted cent, flip the coin over to the reverse side and look at the bottom between the wheat ears. If you see the initials "V.D.B." there in very small print, you have a highly sought after Lincoln cent. A coin in average condition (about VG20) will fetch about $1000 in the current (2011) market. "V.D.B." was the coin designer's initials and stand for "Victor D. Brenner".
Most Australian pre-decimal silver coins featured the Australian Coat of Arms at different times, and so does the non-commemorative 50 cent coin. The Australian Coat of Arms features a kangaroo and an emu. Please narrow down the possibilities with a year and a denomination.
If your Australian 50 cent coins have been circulated, probably not much more than face value, since coins from most years are still in circulation. Individual coins have a value determined by the past year or two of buying and selling coins between dealers and collectors. Not all years of Australian 50 cent coins had "Proof" coins minted. A "complete" set of mint "uncirculated" coins could be valuable, but don't make plans for retirement. I recommend that you take your collection along to a reputable coin dealer will be able to give you an accurate valuation.
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