Another option is to have Sauron, the Necromancer be your commander, since the Nazgl are his servants
Keep them sealed if your main goal is collecting sealed products, but remember that condition, set popularity, and scarcity matter
Ravensburger had underestimated demand badly enough that the first set, The First Chapter, was nearly impossible to find at retail for months
1 to 13
The commander version of casual rares and mythics follow the typical price trajectory of newly release cards - starting off high in value, usually pre-selling for at least half of their original versions, and then dropping in value as more and more commander decks are opened
Non-copy effects that have already applied to the other creatures will continue to apply to them