Based on Japanese community opening data: 23 SR cards per box (guaranteed), roughly 1 SEC per box, 1 Leader Parallel per 6 boxes, 1 SP per 12 boxes (1 per case), and 1 Manga Rare per 72+ boxes (1 per 6 cases)
Max Bullet also deals 60 damage to a benched Pokemon, backing Inteleon up with some hefty collateral damage
Chart shows the price of Mew EX #208 at the end of each month going back as long as we have tracked the item.
25 Tamatoa - Happy As A Clam Achazia's Island, Enchanted, Value $201 Tamatoa's Happy as a Clam from March's Archazia's Island set kicks off our list, coming in at around $200
So, the box that contains the one ring may remain stored somewhere, laying dormant and waiting on someone to find it, much like the ring in the original stories
The flexibility of what can be exiled with it is a strong reason to play it, but the most important one is that it costs only one mana