Some factors that could impact the value of the newspaper include:
- The condition of the newspaper. A well-preserved newspaper in excellent condition will be worth more than a damaged or torn newspaper.
- The rarity of the newspaper. If the newspaper is one of a kind or has a limited print run, it will be worth more than a newspaper that is more common.
- The specific game or event that is featured. A newspaper featuring a major event or game, such as the 49ers' victory in Super Bowl XXIII, will be worth more than a newspaper featuring a less significant event.
- The provenance of the newspaper. If the newspaper can be traced back to a notable owner or source, it will be worth more than a newspaper with no provenance.
If you are interested in selling a newspaper from November 20, 1989 featuring the San Francisco 49ers, it is a good idea to consult with a professional appraiser or dealer to get an accurate estimate of its value.