mtg commander cat deck The 39 Best Commanders in Magic Ranked Secret Lair Commander Deck: Raining

Most of us carefully choose the number of lands that go in our decks to make sure we have enough mana

Besides its obvious implications in Mardu EDH decks already built around attack triggers, in formats like Standard you can benefit from multiples of these

The Hammer is a ludicrous piece of Equipment, costing just one mana to cast, and giving the equipped creature +10/+10 (and stripping it of the Flying keyword, if it has it)

A few hundred dollars, depending on what you wanna grab

I dont think its a big market individual packs are a lot easier. Resealing those individual boosters is called repacking or resealing and its as old as Magic itself