Sell off the contents of the starters and buy them individually. That's the whole point :)

Yep, for the reason you highlighted. There are more cards in there that have above average resale than the other decks (Plasma Behemoth, Spark, Eternal Renewal)

Yes, Crystals are for boosters and starter packs. If you want individual cards, your best bet is to buy Elemental starters and sell off the contents (it works out about 1800 gold per starter I...