Yes - what a shockingly good deal! I know who snatched #75. Sorry, I didn't know you were after those books.
A young guy who works for the estate sale company who took care of the estate on the premise has told me a bit about the owners. The husband passed away a long time ago and his wife currently has a severe Parkinson's Disease. That's all I know. However, I've noticed there were many cool collectibles like 60's/70's Albums, mini sculptures, scoreless classic prints in frames, old classic film reels in hardboard boxes in drawers with the labels, - and of course 1970's Zen-like home deco everywhere in sight. Very nostalgic. Their collections were in an amazing condition - stored in such a little house! I doubt they had children.
I am surprised both books were in stored in the same original bags from the 1970's. Those price marks (found on the back cover) were incredibly cheap. I suspect the owners has bought them at either flea market or a local comic book store yet stored them away ever since. Forgotten, perhaps.
All in all, what an experience!