For example, I’m sure the average joe doesn’t know just how expensive calligraphy pens can be, or how deep the rabbit hole goes on video game speedruns.
Magic: the gathering.
There’s several different styles of play known as “formats”.
The Cheapest being “Standard”. Which is the latest 3-5 sets released. The deck of 75 card deck can cost upwards of £500.
Then the most popular format, modern, which is the last 20ish years of release. The average deck there can be upwards of £1,500.
Then there’s legacy and vintage where decks are in the high 4 figures and some even in the 5 figures.
I always felt like Modern was cheaper in the long run than Standard. Spending hundreds of dollars every few months on a new set didn’t speak to me. Whereas I could buy a few cards here and there to upgrade me modern decks.
My roommate is big into magic, but he refuses to spend a lot of money on it. He makes counterfeit cards of whatever he wants and gets a deck custom printed for $40. He’s also part of a discord group that makes cool fake cards or changes artwork on existing ones.
They’re not allowed to have the official back but since he uses sleeves no one can tell. He’s really up front about it and talks about how he couldn’t get into the hobby or make the decks he likes if he had to pay for real cards.
Don’t forget commander, which a lot of places claim is now the most popular format. Pre-constructed commander decks can cost as little as $20-40 and competitive commander decks can easily go into the thousands.
The game also has a very high skill ceiling. I think that’s one of the main reasons why magic has such a broad age range to its player base. There’s plenty of weird lines of play, from strange card / rule interactions to weird deck themes no one else would think of.