Both PSA and Beckett have been known to attend shows and offer in-person grading
Use the characteristics of Spark Double as it enters the battlefield, not of the copied permanent, to determine whether it enters with an additional counter on it
This ones hard to prove, but we can compare trophy decks of the same archetype to try and spot a loose relationship between the amount of Blood tokens they produce and their land count
Update: The search is over folks, The One Ring card worth $2m has been found (sorry to everyone who was hoping to discover it themselves)
Consistent board presence and card draw go a long way here, and the never-ending impulse draw that Magic keeps pumping out means Faldorn always gets new tools to play with
In return, the opponent is granted a basic land, perhaps symbolizing a new beginning or a reluctant retreat