The big hitter here was Mana Crypt, an insane mana rock which, at the time, was a staple in every high-level Commander deck and most Vintage lists
P/T Number 95 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (3/19/2021) An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger, but after targets have been chosen for that spell
I hope your jaw dropped as much as mine when seeing that figure
For a box with around 360 to 540 total cards, expect to pay at least $100-$150
Archived from the original on 20 February 2002
There's an important caveat, though