Doing a maximum of 270 damage with Psy Purge, Mewtwo is a certifiable threat to many V and VSTAR Pokmon, particularly if you equip it with a Choice Belt or slap down a Galarian Zigzagoon before attacking
And thats before demand has had a chance to drive prices up even further
Everyone I've run into runs Capsize, among other buyback options, because if you spend the buyback cost, it won't be exiled, it will just go into your hand
Typical resale values in the UK: Holographic cards from early sets: 15 to 40 Popular character cards like Pikachu or Mewtwo: 10 to 30 Complete or near complete sets: potentially hundreds of pounds Condition plays a huge role
Clone only copies the "Garruk Relentless" side of the card
Otherwise, its good enough to play for the +1 ability alone