Best way to buy a large amount (50b) of gold Rs3

Would like to buy around 50b or phat (whichever is recommended), account has decent level (not maxed and some level 1s for new skills but lots of 99's 120 combat) and is over 20 years old. Really do not want to lose this account as is main. Can anyone advise on best way to purchase please? Have not bought any items / rsgp in atleast 13 years and never previously received a warning or anything.

Thank you

 

In my experience it all completely random. Can trade from maxed account and still get banned. Can trade a highly reputable person and still get banned. It's the luck of the draw honestly.

Edit: if you are to worried on loosing your account, make an alt trade it to alt and let it rest for like a week. Then transfer it yourself on the same IP later.

 

I feel like with THAT amount of GP it's a big risk. But then again... risk fighters constantly buy/sell bils every day and they're not banned.

 

Your best bet is to do that big of a trade with a partyhat.