(Big Furry Monster)[/casthaven], [casthaven]Mouth to Mouth[/casthaven], [casthaven]Spark Fiend[/casthaven], and [casthaven]Mesa Chicken[/casthaven] broke conventions in other ways
It's hard to imagine that the Secret Lair version of Narset will be anywhere near $1 considering that even the least valuable Secret Lair cards are worth $45, and Narset, Enlightened Master has a relatively high amount of Commander demand (49th most popular Commander) and no other promos or special printings, potentially making the Secret Lair version a popular choice for Commander decks
The first was the Duo cycle
So the math only works at the top of the value range
It may not be considered a budget deck, but you should be able to build a strong Bounce-focused deck without breaking the bank, especially if you get some lucky pulls like Cinderella, Stouthearted and Arthur, Wizard's Apprentice
Simply plop it down and watch as your foes scramble to find a way to get rid of it before it kills them