I've bid on a few golden age Blackhawks recently (thanks to you) in 5.5 - 6.5 range and I lost all of them. They each sold in the $650 to $900 range which was much more than I was anticipating. The older early issues are a lot more desirable than you're giving them credit for.
Yes, the Golden Age issues can be expensive and they do have great covers and artwork. I was lucky to get a few golden age issues at a pretty good price. Once you get to the Silver Age though, unless they are very high grade, they're pretty cheap.
Great video! I always think about those folks who find those Superman and Detective Comics in their grandmothers attics, perfectly preserved inside of another book.... that's the Dream! I had a huge collection of the classics illustrated years ago - that is a great series in my opinion. LOVED LOVED Jimmy Olson (lol) - I forgot about Black hawk ... great flip through!