The Closest I'll Ever Get to Superman #1

I was recently digging through a collection of comics I bought. At the bottom, there was a curiously wrapped bundle. I thought to myself, C'mon, be Action Comics #1! It was Action Comics #61 instead, from June 1943. It is probably the oldest super-hero comic I will ever find.
This comic was in terrible condition, with old water stains and mold spots. The pages were brittle and flaky. It sold for $100 on eBay.
Action Comics #1, featuring the debut of Superman, was published in June 1938. It is estimated there are only 50-100 original copies in existence. I would love to find one in any condition!