also I don't play arena so I'm gonna say the 4 arena passes are worth around 2 packs.
Even if you just start the arenas and retire them right away without playing a game, you'll get 4 packs for them plus about 100 dust/gold (a combination of them).
If you actually play them and you just barely win as many games as you lose, they'll give you 4 packs and about 200 gold. If you can manage 7 wins on average as I do, they'll give you 4 packs and about 700 gold.
Even if you just start the arenas and retire them right away without playing a game, you'll get 4 packs for them plus about 100 dust/gold (a combination of them).
If you actually play them and you just barely win as many games as you lose, they'll give you 4 packs and about 200 gold. If you can manage 7 wins on average as I do, they'll give you 4 packs and about 700 gold.
https://hearthstone.gamepedia.com/Arena