Although Machamp Exs impressive HP, its damage is relatively low
Instant-speed Grim Bounty is a great way to deal with the format's biggest threats and the treasure could help ramp or splash
And of course, you want to see this in your opening hand for that Scry 3 effect every time
Its primary utility lies in its ability to reduce your life cards to a low enough count to activate the healing effects of cards like OP04-112-yamato-722, OP07-119-portgasdace-342, and EB02-052-enel-901
If youre pricing vintage cards, Japanese exclusives, or other international versions, its a good idea to use a global marketplace like eBay's sold listings to see what theyre selling for internationally
If you play an Amulet turn 1, you can tap the land you already have out on turn 2, play a bounce land, return the tapped turn 1 land to hand, then tap the bounce land for an extra 2 mana