Pick the one that matches what you collect, get your collection scanned in, and you will never lose track of what you own or what it is worth again
After that, it's simply a case of playing Thassa's Oracle (or Laboratory Maniac or Jace, Wielder of Mysteries) and netting that win
now, those boxes can be sold for anywhere between $500-600
While it isnt always easy to hold up that much mana for a combat trick, its often well worth it to trip up someone who overextended their resources at the start of their turn or was a little too cocky when declaring attackers
Collector Boosters typically cost anywhere between $400 and $500 brand new, and if you're looking for pure profit through keeping a box sealed, there is every chance that its value will increase over time
Swordsworn Cavalier will continue to have first strike even if the other Knight that entered the battlefield that turn has since left the battlefield, has since stopped being a Knight, or another player has gained control of it