Walter Yacoboski scraped together nearly every penny he made as a cook in 1979 to begin buying a small collection of rare comic books for $10,000, hoping his boyhood passion could one day pay off as an investment.

That day may soon be here.

Yacoboski's copy of Amazing Fantasy No. 15 from 1962 - which introduced the world to Spider-Man - could fetch $400,000 or more when it goes up for auction later this month.