As of 2015, the most valuable Marvel comic is the first Marvel Comics volume published in October 1939. The comic was issued by Timely Publications prior to the company's name change to Marvel Comics. The estimated value for quality copies of the comic range from $300,000 to over $500,000.
Other Marvel comics that rival Marvel Comics volume one include the reissue of the first volume released in November 1939, Captain America volume one released in 1941 and Amazing Fantasy volume 15, which featured the first appearance of Spiderman. Additional, highly valuable comics include the first issues of the Incredible Hulk and the Fantastic Four, as well as Journey into Mystery number 83, which features the first appearance of Thor.