Buy / Sell: Buy is the price your buy offer fills at (what a rushed seller will take right now). Sell is the price your sell offer fills at (what a rushed buyer will pay). Put a buy offer at Buy, a sell offer at Sell, and you pocket the gap. Prices are up to about 60 seconds behind live, and a margin can vanish the moment other flippers spot it.
Tax is the GE fee the seller pays:
2% of the sale price per item,
rounded down to the whole coin (so anything sold for 49 gp or less pays none), and
capped at 5,000,000 gp per item. Bonds, energy potions, some low-level food and ammo, common teleports and basic tools are exempt. The fee was 1% from 9 Dec 2021 and went up to 2% on 29 May 2025. Source: the
OSRS Wiki Grand Exchange page.
Net margin is your profit per item after tax (Sell, minus the tax on it, minus Buy) if both offers fill at the shown prices. ROI is that margin as a share of the buy price, so you can compare how hard your gp is working.
Profit @ limit is net margin times the GE buy limit, the most you could make in one 4-hour limit window if volume weren't a factor. “—” means the item has no known limit.
Flip score (the default sort) is a more realistic profit estimate: net margin times whichever is smaller, the buy limit or half the daily volume. Halving the volume assumes you'll only ever catch part of a day's trades. It's a ranking guide, not a promise.
Daily volume is how many of the item traded over the last 24 hours. The feed refreshes roughly once a day, so it can be a few hours old (the top strip shows its age). High volume means offers fill fast and the margin is believable; low-volume items often show fat margins that never actually fill. By default the scanner hides anything under 500 trades a day.
Age is how long ago the fresher of the two latest trades happened. It turns amber past 30 minutes and red past 2 hours. A stale price means nobody has traded near it lately, so the margin shown is probably fiction.