Item sets

Sets exchange at the GE clerk for free, so any gap between a set and its pieces is arbitrage. Combine = buy the pieces, exchange, sell the set. Split = buy the set, exchange, sell the pieces. Each row shows the better direction with its actual numbers: you pay to buy in instantly, you receive after selling instantly and paying GE tax — so pay + profit = receive, always.

Set↓	Best play↓	You pay↓	You receive (net)↓	Profit↓	Set vol/day↓
Dharok's armour set	COMBINE	3.6m	3.63m	+35,220	1,393
Guthix armour set (lg)	COMBINE	169k	190k	+21,519	90
Guthan's armour set	COMBINE	775k	792k	+17,083	361
Saradomin armour set (lg)	COMBINE	245k	258k	+12,124	171
Rune armour set (sk)	COMBINE	129k	126k	-2,924	54
Rune armour set (lg)	COMBINE	129k	125k	-3,102	628
Zamorak armour set (lg)	COMBINE	518k	512k	-6,175	133
Karil's armour set	COMBINE	1.17m	1.14m	-25,934	195
Obsidian armour set	COMBINE	2.94m	2.91m	-31,747	223
Dagon'hai robes set	COMBINE	1.12m	1.07m	-42,311	153
Verac's armour set	SPLIT	726k	678k	-47,933	176
Torag's armour set	COMBINE	932k	847k	-84,882	106
Ahrim's armour set	COMBINE	2.9m	2.8m	-95,671	329
Sunfire fanatic armour set	COMBINE	6.16m	5.78m	-376k	86
Gilded armour set (sk)	COMBINE	23.2m	22.7m	-456k	5
Gilded armour set (lg)	COMBINE	28.3m	27.5m	-822k	31
Justiciar armour set	COMBINE	31.6m	30.5m	-1.13m	326
Masori armour set (f)	COMBINE	147m	145m	-2.04m	214
Ancestral robes set	COMBINE	217m	213m	-4.05m	190
Inquisitor's armour set	COMBINE	349m	342m	-7.29m	162

Positive numbers are rare and close fast — check the set's volume before committing a bankroll. Sets trading under 5/day or with incomplete price coverage are hidden rather than shown with phantom numbers a stale tick invented.