Cheapest listings I could find on TCGPlayer for damaged-but-tournament-legal power nine cards:
Ancestral Recall: $2,700
Black Lotus: $30,000
Mox Emerald: $2,150
Mox Jet: $2,200
Mox Pearl: $1,800
Mox Ruby: $2,400
Mox Sapphire: $2,700
Timetwister: $3,680
Time Walk: $2,170
Total: $49,800
Let's make the math easy by saying you can get the whole P9 for $50k including shipping. Now of course you're going to want four copies of Oracle of the Alpha, so in case you draw all of them, you'll need four copies of the P9. So that's $200k. But you're not thinking like a real Magic player yet. Any creature with a good ETB ability, you're going to want to blink it. Let's add four copies of Momentary Blink. That means you can potentially proc Oracle an additional eight times per game, so now we're up to $600k. Oh wait, I forgot Soulherder existed. That's, uh....
The ultimate flex, if your name is Post Malone or something, would be to build a 60-card Oracle of the Alpha/Battle of Wits deck. Let's say that in the worst case you might draw through half of it before you get the combo set up. That means you'll need to refill with 170 cards, or 19 copies of the Power 9. This deck will cost you $950,000. That's ignoring the fact that you will pretty quickly start affecting the market by trying to build it....
If your running blue throw in displacer kitten and anytime you play an instant or sorcery or any non-creature, you bounce the bird for more p9 copies, then throw in a teferi that gains loyalty on draw and you got a stew going