shot is relative. In amazing fantasy, people pay for sinlge pages and it would surprise you for hw much.
When I sold most of my collection, it was virtually all silver age with a few bronze. 12-15 cent comics, virtually all marvel. When I started, I made similar presumptuous statements as yours. I thought my AF 15 introducing Spiderman to maybe be worth 4-5K. It wound up graded at a 5.0 and sold for over ten times that. BUT, I was not in a hurry and waited a year watching and learning as you are doing now. Time well wasted. Value is based on demand. The stuff you have chucked out there doesn't have high demand. There are lots of copies like it. In terms of value, yes post .20cent books occasionally have value but not a bunch. Having them graded and slabbed wipes out most profit.
Watch different sites, high grade, mycomics, metropolitan comics etc. Watch Ebay but only for books that have been sold.
You are not the only person with what appear to be "Old" comics. Actually they are rather recent and that helps explain their condition. Somebody's mom was locked out of the room.