Buying from external sites is never truly "safe" because Blizzard actively monitors transactions.
The WoW Token is the only method where you are not at risk of being banned or scammed.
: WoW Tokens are available in certain versions of Classic (like Cataclysm Classic), allowing you to legally exchange real money for gold through the official Auction House. 2. Risks of Third-Party Gold Buying
: Purchase a Token from the in-game shop for real money and list it on the Auction House for gold.
The only 100% safe and officially sanctioned way to buy gold in World of Warcraft is through the . Using third-party sites violates Blizzard's End User License Agreement (EULA) and carries significant risks, including permanent account bans and loss of progress. 1. The Official "Safe" Method: WoW Tokens
Buying Gold from Third Parties is Forbidden - Blizzard Forums