Processing flips. Buy tradeable materials, make them into a tradeable product with a skill, and sell for profit (after the 2% GE tax). Recipes are verified from the OSRS Wiki — exact items, quantities and levels. Profit uses current instant-buy prices for both sides, so your real margin depends on the spread and whether your offers fill; you also need the listed skill level (and any noted one-time unlock), and this doesn't count your time. Hover ⓘ for notes. Not affiliated with Jagex; not financial advice; never automate the Grand Exchange.
| # | Method | Skill | Make | From |
Cost | Profit | ROI |
|---|
| 1 | Cook karambwan ⓘ | Cooking 30 | 1x Cooked karambwan | 1x Raw karambwan | 283 | +167 | 59% |