Maybe in your opinion, buying gold online is a sure way to get your Runescape account banned. Not only that, you might lose all the other rs 07 gold accounts that you have. Jagex will log your IP and ban any account that is originating from that particular IP address.
For the gold sellers, (the vast majority of which are in China), this is no big deal. For them it is a matter of losing a single level 3 player because they are constantly creating these mule players and using them on proxy servers. If one gets caught and deleted they have plenty more to take its place. This is why if you ever purchase gold from one of these sellers you will not see a higher level character giving you the runescape gold.
They make sure that their higher level money making characters are never associated with the gold transactions themselves. They will then use these higher level gold maker accounts and have them trade with a shadow account. That shadow account will then trade with the gold trader account. This way the truly valuable gold maker account is always insulated and for the most part safe from scrutiny because it is never actually associated with the gold trader accounts.http://www.rsgoldall.com/