Throw some items to him

u sell him your gold la.. RM10 per mil

He is using your account? Kick him out la.

his bro = little bro aka student
else he will not ask ts to buy him gold

He is student or working? Sure or not he will listen to you?
Scared afterward he bought something but cannot pay, then your account kena ban 

Ask him to farm and get money to buy himself la. Be independent. You are brother must be responsible to teach him also

lol big bro tarak duit?
ask him to link mastercard to ur diablo muahaha

how old dude? 

Go dig out some old posts at the Barb thread.
Some people said Barb's items are cheap.
Some bought all gears for 2-3 million D3 gold and completed Inferno.
Some could whack like a boss with 4K DPS weapon.
Seek those guides.

May the force of Bul'Khatos be with you and your Barb bro.

if he's earning and using his own pocket money to buy in-game gold/items, u cant really stop him in a way.

it's better to let him do it actually, or else he will never learn. some gamers are too hot-headed they spent real money for games, but after that they'll regret and understand it's not worth it..

only when adults start to spend real money for games, THAT is when there's no way to stop them already.

my honest opinion la... young kids that got deprived from spending on games, they will spend even more when they can afford to next time..

ooo..big brother susah abit, like this the more gold u got if he come play, the more he gonna spend it 

It is very easy to get gold now.
All blue and yellow items drop like Christmas candies.

lol.. u alr advised him not to..
ask him to buy very little first.. maybe he will stop 

btw farming gold is easy and fast if he's desperate for gold farming.
wear max GF set and go spam act3 (nm/hell)

well..if u cant stop him, then might as well earn abit from him 

ask him buy gold, then u tax abit ler.heheh..at least u get back ur gold and earn abit...

*cough* offgamers *cough* I think

Maybe this would be very bad but I might do this....
You : hey bang....My D3 kena ban by Blizzz OMG....I tested out some bot and they detected it !!!! T_T
Bro: How come you so clumsy   !!!!! Why on earth you do that........
You: We can't play D3 any more T_T ....Anyway i still got torch light  ... i wont be playing anymore D3
In reality you still play D3 secretly  ... and he can keep on with his family... life goes on with white lies

ONE SIMPLE SOLUTION :

UNINSTALL D3

INSTALL GW2

End of story.