1. Sythe.org
2. Sythe.org
3. Sythe.org
This is the only site I've used for buying gold, and I've had a fine experience with it. GOLD4FUN has had many scary stories of people being scammed by them. As for others I can't really comment. Just find a trusted seller here and buy off them, I'd rather pay a bit more if I knew it will be safe.