Buy / Sell — Buy is the latest instant-sell price (what impatient sellers accept — the price your buy offer fills at); Sell is the latest instant-buy price (what impatient buyers pay — the price your sell offer fills at). Place a buy offer at Buy, a sell offer at Sell, and you capture the spread. Prices come from the RuneScape Wiki real-time API and are up to ~60 seconds delayed; margins can collapse the moment others notice them.
Tax — the GE convenience fee, paid by the seller:
2% of the sale price per item,
rounded down to the whole coin (so items sold for ≤49 gp are untaxed),
capped at 5,000,000 gp per item. Bonds, energy potions, some low-level food/ammo, common teleports and basic tools are exempt. Rate history: 1% from 9 Dec 2021, raised to 2% on 29 May 2025. Source: the
OSRS Wiki Grand Exchange page.
Net margin — Sell − Tax(Sell) − Buy: the post-tax profit per item if both offers fill at the shown prices. ROI — net margin ÷ buy price: return on the gp you tie up.
Profit @ limit — net margin × GE buy limit: the theoretical maximum per 4-hour buy-limit window, ignoring volume. “—” means the item has no known limit.
Flip score (default sort) — net margin × min(buy limit, daily volume ÷ 2): a volume-capped “realistic profit” per limit window. Dividing volume by two assumes you can capture at most half of a day's trades on one side. It's a ranking heuristic, not a guarantee.
Daily volume — items traded over a 24-hour window (Wiki /volumes — a snapshot that updates roughly daily, so it can lag several hours; the header strip shows its age). High volume means offers fill fast and margins are believable; low-volume items often show fat margins that never fill. The default filter hides items under 500 trades/day.
Age — how old the fresher of the two latest trades is. Amber over 30 minutes, red over 2 hours: a stale price means nobody has traded at it recently and the shown margin is likely fiction.