Please note that characters, items, and friends lists do not transfer across regions. Playing on a different region's servers means you'll be creating characters and friends lists specifically for that region, and you'll be accessing the gold-based auction house for that region.
Can we buy gold from the currency-based auction house?
Players will be able to buy and sell gold through the currency-based auction house at whatever the current market price is, as established by the player community.
Best Answer
No.
Source: http://us.battle.net/d3/en/forum/topic/5051765311