0$ Highest rank: Legendary, first obtained after Nax with a Zoo warlock deck. Got there by practicing the minion position on the board and what spells to trade arround. (Won most mirrors)
You need 1 deck tuned deck that suit the current meta, this dosen't req. any legendary cards, and thus not much grind. How ever more cards will give you more options and help you to learn the game/meta and such.
Getting legendary is a 1 month grind at a learning curve of that current meta. Some people have trained this skill for months.
If you can get anything above 50% win rate, you can go legendary with enough games. People misplay/disconnect or tilt.
Even bots could get legendary (without legendaries), and they had major flaws. (Dunno if true anymore tho)
Yes most legendary players spent money.
Casual players are less likely to spend money.
Deck Matters - but money won't take you to legendary. It enable you to play more deck/classes.
It takes ALOT of money to get all the cards.
Best of Luck, game is worth spending money on but not needed if you manage to grind/do dalies.
Edit:
https://www.youtube.com/watch?v=78ywEvf8fRw(Pre Black rock mountain) Estimated 110$ is the average amount people pay.
28% Players still haven't spend a dime.
This post was edited by IronBird on Jun 29 2015 12:40am