Originally Posted by
Rynjin
...So do that? Consistently do that, even, and craft all the cards you want. I left the F2P train behind ~6 months ago when it became part of my job to report on this game, but that's what I did back when I never paid a single red cent for cards.
I still end up dusting just about every Golden card I open up.
There is SOME value in sitting on Legendaries you don't want because you can't get duplicate Legendaries, but unless you plan on opening a bajillion Classic packs any time soon, you're better off dusting all of the above except Deathwing (which is actually used in some Tier 2 decks RIGHT NOW and has intermittent uses over time) and crafting Antonidas, Tirion, or Ysera (depending on whether you play Mage, Paladin, or neither more).
Edit: Well, apparently Deathwing isn't in any decks ANY MORE (it was in both HL Dragon Paladin and Hunter for a while), but the point stands; it's the best card to hang onto of those 5)