So I was going through some of my grandparents' old stuff and came across a box full of airline timetables from the 1960s. It's mostly European airlines like BEA, Pan Am, and Lufthansa. I honestly didn't even know people collected these until now. They're in pretty good condition, but I'm not sure what to do with them. Are these worth anything? Should I keep them or try to sell them? Also, any tips on how to store them properly if I decide to keep them? I've got about 20 of them and they're pretty cool, but I want to make sure I'm taking care of them correctly. Would love to hear from anyone who's into collecting these or has some advice!