By my estimation (and I don't value cosmetics highly) the Spark Bundle nets you a positive $15 in value , the key is if the 1,500 gems are worth about $10, and the wildcards are worth a combined $30, then you minus 25 ($24.99) from 40 ($30+$10) to get the $15 in value
Ragavan, Nimble Pilferer is one heck of a powerful little monkey that can provide card advantage by exiling the top card of an opponent's library whenever it deals combat damage, allowing you to play that card, AND creating a treasure token
If you do, the effect continues to apply even if you lose control of Vedalken Humiliator or your artifacts later in the turn
This is the structural reason SIRs hold value better than standard ex cards over multi-year holds
The New Mechanics Ive spent the last week writing articles brewing decks for each element, and I am genuinely impressed by how well the mechanics translate the feel of the show