1. Condition: The overall condition of the dictionary, including the binding, pages, and any signs of wear and tear, will impact its value. A dictionary in excellent condition with no major damage or markings will be worth more than one that is heavily worn or damaged.
2. Rarity: The scarcity of the particular edition of the Webster's Practical Dictionary Self Pronunciation can also affect its value. If it is a rare edition or a limited print run, its value may be higher.
3. Historical Significance: The historical significance of the dictionary, such as being associated with a notable event, person, or place, can also add value. For example, a dictionary that belonged to a famous author or was used in a historical setting may have a higher value.
4. Collector's Interest: The demand from collectors can influence the value of the dictionary. If it is sought after by collectors interested in vintage dictionaries or historical items, its value may be driven up.
5. Market Trends: The overall market for vintage books and dictionaries can also affect the value. Certain periods or styles may be in high demand, which can impact the price.
It's always a good idea to consult with reputable book dealers or experts in the field to get a more accurate assessment of the value. Additionally, online platforms and auction sites can provide insights into the current market value of similar items.