Market value is $25, and seems fairly stable right now as well, albeit the foil version fetches 10x that, with listings up to $250 at TCGPlayer right now
(from duelinglegacy and shriek) It seems like X-sabers might be a deck to look out for according to Konami's pricing
The promotions will begin November 3rd, the day the set releases in stores (though your mileage may vary)
Considering that the Eeveelutions are fan-favorites, this price point is likely to remain high in the future, making it a safe investment for traders
The best time to wheel is when your hand is empty (or nearly) and your opponents' hands are full
The three-drop artifact Monument to Endurance will turn any of your discards to draw, ramp with a Treasure or making each foe lose three life - but just once each per turn