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Black mask

item #8921 · buy limit 70 · 15 days of history backtested

Latest price: 839,000 gp instant-buy · 810,519 gp instant-sell
Last 24 h average: 840,807 gp high · 814,042 gp low · 821 traded

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Buy limit70
TypeMembers
Notenot in the current top scan — backtest below still applies

Price chart

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Candles use the GE's average instant-buy (wick top) & instant-sell (wick bottom) per period; bodies show period-to-period mid-price moves — the GE publishes no true open/close. buy bandsell band

Backtest — profit/day per unit by band

Each cell replays this item's history with that buy/sell percentile pair, no lookahead (bands from past data only). ★ = best. Hover a cell for flips & hold time.

buy↓ sell→75%80%85%90%93%97%
5%4.5k★00000
8%4.5k00000
12%3.5k00000
16%3.5k00000
20%3.5k00000
25%2.2k00000

Optimal buy 5% / sell 75% → 1 flips, 4.5k/day per unit (~2.0h hold)  vs  Default 12% / 93% → 0 flips, 0/day

Bands are a starting point, not a promise — the fill model is simplified and popular flips crowd (your buy gets bid up, your sell pushed down). How this works →

Unofficial fan project — not affiliated with or endorsed by Jagex. Data from the OSRS Wiki real-time prices API. A game, not financial advice; nothing here is automated and you shouldn't automate it (it's against Jagex's rules).

For information only - not financial advice. In-game Grand Exchange prices fluctuate and flips can lose value; trade at your own risk.
More tools from the same maker: PokePulse — Pokémon card prices · ESO Decoded — every ESO set, decoded · EveryGameMade — fact-checked game encyclopedia · Mistfall Hunters — the honest Mistfall Hunter guide