Quote Originally Posted by Riot View Post
Next one will be 8 Bil coins. I have a suspicion that with the next major patch another mount will be released with the title hero.

While I know 4 Bil is a lot of coins for the current top mount, I don't think it is unreasonable. If it was too easy for everyone to get the top mount, then it would not be anything special.
my guess is 6b. however the point is to make you spend gems to avoid the 30% XP transfer penalty. its actually really smart and tip of the hat to that