You have to set up and account with the mint, it is very easy to do by phone or the web
No.
If your 1971 coin is a uncirculated example it may be worth about $5.00 because the 1971 & 1972 issue coins were not included in the Uncirculated Mint sets sold from the Mint in those years. In general none of the circulated coins have more than face value. Only proof and uncirculated collectors coins sold from the Mint have premiums. The Mint did offer Proof and Uncirculated coins in 1971-1976 that were struck in 40% silver.
Yes, in general Mint State coins do have higher values.
If your 1972 coin is a uncirculated example it may be worth about $5.00 because the 1971 & 1972 issue coins were not included in the Uncirculated Mint sets sold from the Mint in those years. In general none of the coins made for circulation have any silver and are not worth more than face value. Only proof and uncirculated collectors coins sold from the Mint have premiums. The Mint did offer Proof and Uncirculated coins in 1971-1976 that were struck in 40% silver.
Winnipeg and Ottawa. I believe that the Winnipeg mint does circulated coins and the Ottawa mint does uncirculated ones.
All Australian 1992 coins are potentially still in circulation so, unless they are a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth whatever is inscribed on them.
If your 1972 coin is a uncirculated example it may be worth about $5.00 because the 1971 & 1972 issue coins were not included in the Uncirculated Mint sets sold from the Mint in those years. In general none of the coins made for circulation have any silver and are not worth more than face value. Only proof and uncirculated collectors coins sold from the Mint have premiums. The Mint did offer Proof and Uncirculated coins in 1971-1976 that were struck in 40% silver.
Uncirculated bank sets are collections of coins that have not been put into circulation and are in mint condition. These sets usually include coins from a specific year or series, and are often sold by mints or coin dealers to collectors. Uncirculated bank sets are popular among numismatists who seek to add pristine coins to their collections.
If your 1972 coin is a uncirculated example it may be worth about $5.00 because the 1971 & 1972 issue coins were not included in the Uncirculated Mint sets sold from the Mint in those years. In general none of the coins made for circulation have any silver and are not worth more than face value. Only proof and uncirculated collectors coins sold from the Mint have premiums. The Mint did offer Proof and Uncirculated coins in 1971-1976 that were struck in 40% silver.
You can purchase coins from the US mint. It is safe to purchase coins from them because you know you are getting what you bought because they make the coins. The link below has there website.
The 1970 Uncirculated US Mint Set is valued at $18.
These coins are potentially still in circulation so, 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 20 cents.