Welcome to my Guide! I know this is a pretty common method to gaining a decent sum of money and achieving another 2B skill, but this gives you exact prices and profits!
~97 Herblore
~Minimum 100M Cash. [Total: 3.95B]
~Patience
Profits:
~6.05B Cash
~16.05B Cash
Step 1A)
Visit the ::shops and purchase Bonemeal via the Herblore Store Salesman. [28,750 GP Per]
B)
Talk to the Supplies Store Salesman and purchase Prayer Potions. [20,700 GP Per]
Step 2A)
Bank your newly acquired supplies [preferably in a new tab], and take out 14x Bonemeal and 14x Prayer Potions (4). Combine the two and make Super Prayer Potions!
B)
Finish making all of your potions and go buy more Bonemeal and Prayer Potions.
Step 3)
Continue making potions until you have 80,000 of them! YES 80K! That is how much 2B Herblore XP takes. With 80,000 potions you will have lost 3.95B making all of them, but no worries!
Step 4)
OPTION 1:
Go home and talk to the Junk Store Salesman. Sell all of your Super Prayer Potions for 125,000 GP each! You will make 10B cash doing so. Cut the price of the supplies and you have 6.05B cash! Not bad!
OPTION 2: [Preferred]
Visit any bank booth in the game and sell your potions in the Grand Exchange for roughly ~250K GP each. You will make 20B cash doing so. Cut the price of the supplies and you have 16.05B cash! Not bad indeed!
Step 5)
Enjoy your 2B Herblore and 16.05B cash!
Hope this guide helped any started out, so good luck getting 2B Herblore! Also, I believe Super Prayers are the best way to make XP in the game, too. Herblore wise.
Thanks anyways. Bye!