What is a good item to invest in on the Grand Exchange on runescape?

need to make money by investing in items. and please be truthful and tell me items that you yourself would invest in
Anyone? know a good item at all?

Yews are good with a price of approx. 400+gp, sharks, lobsters are also very expensive. Diamonds can be very expensive at around 7.6k each. if you can make rune stuff then you better sell them, because they are all extremely expensive(obviously). That’s basically it…

Runescape: Making Money with Money Guide (Merchanting, Investing, Methods)