How does item flipping work in RS3?

Solution 1:

Yes, there is a way to see which items are worth flipping:

  1. You buy an Item for +10% of the current ge price.
  2. You sell the Item for -10% of the current ge price.
  3. Take a look at your ge history and write down those two values.
  4. Buy the same item you've tested multiple times for (lower price + 5).
  5. Sell the items for (higher price - 5).

If the two values at point number 3 have a too low difference, it is not worth to flip the item. The bigger the difference, the bigger your win.

Good Luck!