check the link he posted.
http://us.battle.net/d3/en/services/auctio...use/how-to#feesfees
For Commodities (gems, materials, dyes, pages, recipes, and other non-unique items)
Transaction Fee (Gold Auction House): 15% of final sale price
Transaction Fee (Real-Money Auction House): 15% of final sale price
Transfer Fee (when sending proceeds to PayPal or other authorized payment-service provider): 15% of amount being transferred
1. say sell xxx gold for usd10, choose send to paypal, not battle.net balance.
2. blizzard takes 15% so usd 8.5 remains
3. usd 8.5 to be sent to paypal account
4. blizzard takes another 15% from that usd 8.5
5. usd 7.225 to be sent into paypal account
6. cross region paypal transfer fees not included
7. pay xxx amount cross region transfer fees
well i guess the final amount is close to 30% anyway.