I was looking through some reels I'd picked up last week and there were some very cute Sesame Street ones. Won't my little nephew want to look at these one day? Also, there was a great Godzilla set which took place in Seattle, with Godzilla rising from Puget Sound with the Space Needle in the background; as a lifelong Seattle area resident, I wasn't sure I should part with that one.
On the one hand, I could focus more on selling things on eBay I feel more detached about, and then this dilemma would never arise, but on the other hand, it's much more fun to sell things you really enjoy.
I listed a couple of vintage sets last night and this morning, including this one from The Black Hole, a Disney live-action sci-fi movie from the 1970s. It has lots of cool retro images of robots and spaceships. I never saw the movie myself, so it doesn't have a hold on me the way other Disney movies like, oh, The Parent Trap with Hayley Mills does.