I remember when baseball card collecting was a thing, back in the beforetimes, and all I had to go on was this compendium of data as to whether or not Alvaro Espinoza's rookie card went up 35 cents or not.
Even more vividly, I remember walking through the halls of my school discussing the various whys and wherefores of baseball card collecting with some friends of mine, talking about our baseball card price guides EXACTLY the way suburban dads talk about their lawnmowers. Trust me on this one.