When I was in elementary school my dad introduced me to the concept of inflation using the “candy bar index”. Candy bars were 50¢ when I was a kid. They were, like, 25¢ when he was a kid. Nowadays they’re $1.25.
I still get that when I buy things secondhand, from Mercari, Abe books, or other online thrift stores. I’m waiting for a cute tokidoki vinyl figure to show up. Maybe this week, maybe next. Who knows?