Based on general numismatic knowledge, as the provided context was insufficient for a detailed evaluation, the value of a 1979 one-dollar coin depends heavily on its condition and specific variety. The dollar coin from this year is the Susan B. Anthony dollar, which was minted in Philadelphia (P), Denver (D), and San Francisco (S).
For the vast majority of cases, a 1979 Susan B. Anthony dollar that has been in circulation is worth only its face value of one dollar. These coins were produced in large quantities, with over 750 million minted across all three locations, making them very common. Even in uncirculated, or mint state, condition, a standard 1979-P or 1979-D coin is typically valued at only a few dollars.
The primary factor that can significantly increase the coin's value is a specific error known as the "Wide Rim" or "Near Date" variety. This variation is found on a small number of the proof coins minted in San Francisco (with an "S" mint mark). On these rare coins, the date "1979" is much closer to the rim than on the standard "Narrow Rim" proof coins from that year. A genuine 1979-S Wide Rim variety can be worth anywhere from $30 to several hundred dollars, depending on its certified grade.
In summary, a standard circulated 1979 dollar coin is worth $1. Uncirculated examples and standard proof coins carry a small premium. However, the 1979-S proof coin should be examined closely to determine if it is the rare and valuable "Wide Rim" variety, which commands a much higher price among collectors.
