"$10 USD gets you 7 packs and 1,000 Gold gets you 10 packs.
How-to Break Even w/Gold
At 5 wins you get 6 packs equaling 600 gold. You get 220 gold flat so that’s 820, then you get 220 Arcane Dust. If you check the average dust per pack it’s at 98.25 (I’m going to round it to 100 for simplicity). So the value of the dust is around 2 packs or 200 gold which gets you to 1,000 gold.
How-to Break Even w/Cash
It looks like you’ll need 4 wins to break even with real money. 5 packs = 500 gold + 190 flat is 690 gold, which is almost enough for the 7 packs. Then you add the 190 Arcane Dust which gets you to about even.
This is clearly not for the faint of heart, and if you are looking for value it’s best to just save your money and gold for Amazon Coin deals or playing Arena."
Source: http://www.hearthstonetopdecks.com/new-tavern-brawl-mode-heroic-tavern-brawl/
Looks legit.
8