1. Condition: The overall condition of the comic book plays a significant role in determining its value. A comic book in excellent condition, with no major tears, creases, or stains, will generally be more valuable than one that is damaged or worn.
2. Rarity: The rarity of a particular issue or series can also affect its value. Some issues of Mickey Mouse comics from 1958 may be more scarce or harder to find, making them more valuable to collectors.
3. Collector Demand: The demand for a particular comic book among collectors can influence its value. Mickey Mouse comics from the 1950s are generally sought after by collectors, but certain issues or storylines may be more popular and therefore more valuable.
4. First Appearances: If a particular issue of a Mickey Mouse comic from 1958 features the first appearance of a popular character or storyline, it may be worth more to collectors.
5. Origin Story: Comics that feature the origin stories of popular characters can also be more valuable to collectors.
6. Price Variants: Some comic books from 1958 may have different price variants, such as "regular" or "deluxe" editions. These variants can affect the value of the comic book.
It is advisable to consult with reputable comic book dealers or experts who specialize in vintage comics to obtain a more accurate valuation of a 1958 Mickey Mouse comic book based on its specific characteristics.