The best way by far is to just go bounty hunter, for large quantities that is. However it is extremely dangerous and takes a long time. To play it safe you can do plates at party room, some g.e methods etc:
I did about 8M worth through BH to my main from a friend who quit, I did sets of Rune Gold, Str Ammy T, Etc. I only died once and that was with a Sara Kite, thats when i realized sets were the best way to go. If you stick to BH idea, do sets and do it in F2P, less to worry about .
why the fuck wud u trade from a 127 to a lvl 3? :S lol and yeah i got a way that loses 350k per 1m and u both have to be mems... get 1 acc to sell 10 uncut d stones to the tzhaar gem shop then get the other acc to buy them 1.5k tokkul each. sell back to the account with money for 40k. you can sell fire runes to the rune shop for 1 tokkul each so 10gp = 1 tokkul.
Why I want to go from a 127 to a 3 is no business but my own. I'm just looking for a simple way to trade. That's it. And that method of yours..isn't yours. Everyone knows and it's a shitty way to trade.