This takes me back to when I was collecting hockey cards when I was a kid in the 80s. Need 'em, got 'em, need 'em. I traded and collected some of the best...but alas I didn't retire at 14 because my mom accidentally threw them out with the trash.
Anyhoo, deep down, most of us are just collectors wanting the newest prettiest thang, an addiction that we must sustain by selling something else. We can all agree there's no problem with that. Even if one profits, it all evens up in the end with expenses - equipment upgrades/losses/unsold inventory.
And for those who are in it solely for profit, avoid the public shaming and just get a business license (cost you 2 frags), there you're legit...and get paid in cash so you can pursue another hobby, advanced creative accounting.