So what I am thinking is that we could make a list of coins that you specialize in or are from your country that are hard to find, have some bullion value or are just valuable in general. Now I personally think that the date range should be from around 1900-current time because if we go much older then 1850s then I believe most coins are slightly harder to get or have some value to them. (Please feel free to comment on the date range in any way)
The coin should also be in circulation or have been in circulation, otherwise uncirculated commemoratives or coin sets may become a problem.
So just list the country, the year of the coin, the type of coin, a small comment as to why it has value or is hard to find, and a link to the numista page if one exists.
Australia
1916 half penny: Extremely Rare mule variety.
https://en.numista.com/catalogue/pieces90246.html
https://www.sterlingcurrency.com.au/research/1916-mule-halfpenny-australias-rarest-commonwealth-coin
1923 half penny: Rare due to its low mintage number. (15,000)
https://en.numista.com/catalogue/pieces1564.html
1915, 18, 39* half pennies: Considered scarce due to low mintage. *1939 Kangaroo reverse.
https://en.numista.com/catalogue/pieces1564.html
https://en.numista.com/catalogue/pieces5320.html
1925 penny: Scarce due to low mintage. (117,000)
https://en.numista.com/catalogue/pieces1269.html
1930 penny: Extremely rare. (estimated 3,000 minted in total)
https://en.numista.com/catalogue/pieces1269.html
1946 penny: Scarce due to low mintage. (363,000)
https://en.numista.com/catalogue/pieces5788.html
Any Australian three pences, six pences, shillings, florins and crowns: All of these types of coin have at least .500 silver in them depending on the date.
https://en.numista.com/catalogue/pieces4203.html
https://en.numista.com/catalogue/pieces1563.html
https://en.numista.com/catalogue/pieces10525.html
https://en.numista.com/catalogue/pieces9267.html
https://en.numista.com/catalogue/pieces12503.html
1968 one cent: Currently the lowest year minted for 1 cent coins. (19,930,000)
https://en.numista.com/catalogue/pieces1559.html
1969 two cent: Currently the lowest year minted for 2 cent coins. (12,940,000)
https://en.numista.com/catalogue/pieces1558.html
1972 five cent: Currently the lowest year minted for 5 cent coins. (8,256,000)
https://en.numista.com/catalogue/pieces70.html
2011 10 cent: Rare, Currently the lowest year minted for 10 cent coins. (1,750,000)
https://en.numista.com/catalogue/pieces1565.html
1985 20 cent: Currently the lowest year minted for 20 cent coins. (2,700,000)
https://en.numista.com/catalogue/pieces1703.html
1983, 93 50 cents: Both currently the lowest years minted for 50 cent coins. (1,000,000 for each year)
https://en.numista.com/catalogue/pieces5027.html
2014 1 dollar: Currently the lowest year minted for 1 dollar coins. (1,052,000)
https://en.numista.com/catalogue/pieces3148.html
1993 2 dollar: Currently the lowest year minted for 2 dollar coins. (4,870,000)
https://en.numista.com/catalogue/pieces1568.html
I know the first few coins in my Australian list are pretty much impossible to get but you never know.
If you can contribute or have a suggestion on changing something to make it better, please do.
Kindest regards
Ben