I havent been active on osrs for a while now, and I want to sell all the gp I have, its around 320mil.

How do I do it safely? Someone I know would buy it, so Im not really scared of getting scammed, but more like of getting banned for rtw

Do I just trade all of it at once from my main, or like 100mil daily or something?

Or do I create a mule? I know you should play a bit on it, if so, for example how much?

Any other tips?

 

To be very honest I think you're fine, one trade like that won't bring you into any trouble
But if you want, you could do it through staking

 

I've never even really sold gp, only bought some in small quantinties like 5mil-20mil some time ago

 

Then you're fine