Jar of Decay

The Jar of Decay is a members-only Old School RuneScape item — “Very healthy.”. Its Grand Exchange buy limit is 4 per 4 hours. Right now it buys at 60,000 gp and sells at 99,937 gp — a net margin of 37,939 gp (63.2% ROI) after the 2% Grand Exchange tax of 1,998 gp. High alchemy yields 1 gp.

To flip it, place a buy offer near 60,000 gp and a sell offer near 99,937 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.