Okay. Here is a good way to get money with strength potions as a free to play player. First buy weapons and armor (sheild if you don't have a 2h sword) then, kill hill giants, ice giants, moss giants, or hob goblins until you get a full inventory of limpwurt roots until your inventory is full (bring food in case you get wounded, I suggest chickens since Hobgoblins don't do much damage if you are a high level). Keep on doing this until you have 175 or more limpwurt roots then go to the nearest bank and store your roots there. Next go to where deadly red spiders are (karamja or varrock sewers). then get as many spider eggs, keep on doing this until you have 175 or more roots and spiders eggs. Then, if you have enough money, get 875 gold coins, and go to the potion guy in varrock.then put the pots in the bnk, and withdraw them as notes. Then, sell them to other players for 1,000 coins. Strength potions are popular and pricey amog players. When you have the desired amout of coins, you can buy what ever pricey armor or weapons you want!