In 2017, a copy appeared for sale at Magic Bazar in Paris for $50,000, but the listing was removed, leaving the sales outcome uncertain
Recent buying behaviour hasnt been noteworthy, so its unclear why this and other Reserved List cards like Yawgmoths Will have been growing recently, aside from the obvious reason
If you copy a bestow card that is an aura, a token copy of the bestowed card is created and attached to a new creature, in Ivy, Gleeful Spellthiefs case, it would need to become attached to itself
Two mana upfront is the standard cost for a looter that can loot once a turn
Surge of Salvation Surge of Salvations specificity often regulates it to the sideboard, though the general hexproof attached to the first ability offers enough universality that you could run it in the 99 of an EDH deck if you really wanted