Old Books, Dinosaurs, and Being Terrible At Math

I didn't bother to look it up. What qualifies as Antique?

I know I'm getting perilously close to being old because the books I read as a kid are now valuable. My school lunchbox is probably worth a hundred bucks, easily, and that's assuming I don't clean out the fossilized peanut butter residue. The difference between old books and antiques is that I read my books and enjoy them. I don't gaze at them, dust them, or forget about them as a relic of a bygone era. And I may be strange for saying t...