Crystal key

A mysterious key for a mysterious chest. Crystal key is a members-only item traded on the Old School RuneScape Grand Exchange.

Priced at 23,173 gp, Crystal key is an affordable item suitable for players building their cash stack.

Crystal key has very low trading volume (28 recent trades), which means wider spreads and slower fills. With a buy limit of 11,000 every 4 hours, you can trade in large quantities per session. At the current margin, flipping the full buy limit yields up to 6,457,000 gp profit every 4 hours.

Crystal key currently has a positive margin of 587 gp after the GE tax, resulting in an ROI of 2.5%. With a flip rating of 9/10, this item ranks in the top tier of profitable flips right now — strong margin combined with sufficient volume to trade reliably. The price has dropped 1.7% in the last hour, which could signal a buying opportunity if the margin improves.

Crystal key has a high alchemy value of 90 gp, but at the current buy price it is not profitable to alch.

Use the flip calculator above to estimate your profit based on quantity. Set a price alert to get notified when the margin changes, or add this item to your watchlist for quick access.