Satisfying deal done today. Had a guy reply to my CL ad over a week ago and say that he had a box of comics that his dad had but his dad passed away a few years ago. He saw my ad and let me know, but in conversation also said he'd be open to cash or trade. Apparently he likes to barter. I asked him what he was looking for and he said among things like a lawn mower & household stuff that he'd like a game system for his kids for Christmas. Welp, we have a Wii with tons of games & accessories that nobody around here uses anymore so I suggested that. He was on-board, but we ended up playing "meet-up tag" where his schedule was never free enough for him to meet me...until today. Turns out his dad didn't have them from childhood like I'd assumed (and hoped), but had gotten them from an estate sale some years back. It's definitely a weird mix of books, but I made out quite well.
...and the oddity of the group is this 1975 Creation Con Program. I've never seen one before. Neat stuff!