Auction house flips on NA Normal Alliance

A character can use its own faction's auction house and the neutral Blackwater house of its ruleset. When the same item is cheaper in one than in the other, you can buy it there and list it in the other. These are the gaps on World of Warcraft®: Forever that were also there a day ago, biggest first. Pick another house in the menu above.

Prices from the dumps of 25 min ago (14 Nov 00:17 UTC)

Buy at Blackwater, sell on Alliance NA Normal Blackwater → NA Normal Alliance, 5% cut

Item	Buy	Sell	Gap after cut	To buy	Listed there
Deviate ScaleBuy 79c, sell 1s 99c	79c	1s 99c	+1s 10c139%	66	775
Scroll: THAW WORDSBuy 1s 99c, sell 3s 69c	1s 99c	3s 69c	+1s 52c76%	28	156
TigerseyeBuy 1s 6c, sell 1s 95c	1s 6c	1s 95c	+79c75%	166	619
Scroll: TOPAZ YORAKBuy 1s 98c, sell 3s 45c	1s 98c	3s 45c	+1s 30c66%	43	204
Scroll: UPDOGBuy 2s 22c, sell 3s 48c	2s 22c	3s 48c	+1s 9c49%	59	106
Green Hills of Stranglethorn - Page 11Buy 4s, sell 6s 9c	4s	6s 9c	+1s 79c45%	45	131
Turtle MeatBuy 2s 14c, sell 3s 18c	2s 14c	3s 18c	+88c41%	179	1,293
Mystic Heavy Armor KitBuy 12s, sell 17s 59c	12s	17s 59c	+4s 71c39%	21	176
Heavy Blasting PowderBuy 2s 97c, sell 4s 30c	2s 97c	4s 30c	+1s 12c38%	45	725
SwiftthistleBuy 2s 49c, sell 3s 44c	2s 49c	3s 44c	+78c31%	798	2,219
Scroll: SHOOBEEDOOPBuy 2s 50c, sell 3s 41c	2s 50c	3s 41c	+74c30%	39	174
Stonescale EelBuy 94c, sell 1s 27c	94c	1s 27c	+27c28%	637	6,785
Heavy LeatherBuy 1s 80c, sell 2s 23c	1s 80c	2s 23c	+32c18%	2,835	4,760
Bolt of RuneclothBuy 33s, sell 39s 49c	33s	39s 49c	+4s 52c14%	66	910
Mageweave ClothBuy 6s 5c, sell 7s 5c	6s 5c	7s 5c	+65c11%	1,101	1,903

Buy on Alliance, sell at Blackwater NA Normal Alliance → NA Normal Blackwater, 15% cut

Item	Buy	Sell	Gap after cut	To buy	Listed there
Waylaid Crate: Journeyman IngotsBuy 2s 98c, sell 10s 50c	2s 98c	10s 50c	+5s 94c199%	281	37
Fish BowlBuy 49c, sell 1s 70c	49c	1s 70c	+96c195%	829	26
Lesser Arcane ElixirBuy 5s 80c, sell 20s	5s 80c	20s	+11s 20c193%	392	62
PyriteBuy 1s 45c, sell 5s	1s 45c	5s	+2s 80c193%	855	402
Sulfuric AcidBuy 3s 20c, sell 11s 2c	3s 20c	11s 2c	+6s 17c193%	712	71
Minor Mageblood ElixirBuy 1s 48c, sell 5s	1s 48c	5s	+2s 77c187%	764	30
Nightfin SoupBuy 6s 14c, sell 20s	6s 14c	20s	+10s 86c177%	357	62
WildvineBuy 86c, sell 2s 80c	86c	2s 80c	+1s 52c177%	1,633	173
Copper OreBuy 82c, sell 2s 66c	82c	2s 66c	+1s 44c176%	15,320	2,155
Lesser Healing PotionBuy 31c, sell 1s	31c	1s	+54c174%	972	221
ShadowgemBuy 2s 70c, sell 8s 69c	2s 70c	8s 69c	+4s 69c174%	548	140
Buzzard WingBuy 2s 80c, sell 9s	2s 80c	9s	+4s 85c173%	598	206
Coarse Sharpening StoneBuy 94c, sell 3s	94c	3s	+1s 61c171%	275	27
Deeprock SaltBuy 2s 64c, sell 8s 39c	2s 64c	8s 39c	+4s 49c170%	552	76
Waylaid Crate: Apprentice OreBuy 3s 16c, sell 10s	3s 16c	10s	+5s 34c169%	628	156
Bear MeatBuy 38c, sell 1s 19c	38c	1s 19c	+63c166%	3,568	76
Scroll of Liminal PassageBuy 7s 99c, sell 25s	7s 99c	25s	+13s 26c166%	291	96
Boar RibsBuy 96c, sell 3s	96c	3s	+1s 59c166%	594	38
Lesser Cleric's ElixirBuy 6s 51c, sell 20s	6s 51c	20s	+10s 49c161%	203	34
Green Hills of Stranglethorn - Page 8Buy 4s 45c, sell 13s 50c	4s 45c	13s 50c	+7s 2c158%	127	183
Thick HideBuy 5s 28c, sell 16s	5s 28c	16s	+8s 32c158%	497	110
Elixir of Lesser IntellectBuy 5s 95c, sell 18s	5s 95c	18s	+9s 35c157%	365	80
Small Leather Ammo PouchBuy 1s, sell 3s	1s	3s	+1s 55c155%	97	23
FirebloomBuy 8s 45c, sell 25s	8s 45c	25s	+12s 80c151%	2,392	219
Elixir of AgilityBuy 6s 61c, sell 19s 50c	6s 61c	19s 50c	+9s 96c151%	300	74

Alliance against Horde

Moving goods between the factions needs a character on each side and a hand-off through Blackwater, where anyone can buy the listing before your other character does. So these gaps are harder to use, but they show how far apart the two factions' markets are.

Buy on Horde, sell on Alliance NA Normal Horde → NA Normal Alliance, 5% cut

Item	Buy	Sell	Gap after cut	To buy	Listed there
Lion MeatBuy 1s 2c, sell 3s 22c	1s 2c	3s 22c	+2s 4c200%	802	1,019
Dark Iron OreBuy 8s 25c, sell 23s 97c	8s 25c	23s 97c	+14s 52c176%	579	342
Scroll of Cat FamiliarBuy 2s 44c, sell 6s 90c	2s 44c	6s 90c	+4s 12c169%	82	240
Raw Mithril Head TroutBuy 38c, sell 1s 1c	38c	1s 1c	+58c152%	4,139	5,370
Manual: Superior Healing PotionBuy 20s, sell 52s	20s	52s	+29s 40c147%	31	20
Packet of Tharlendris SeedsBuy 2s 50c, sell 6s 45c	2s 50c	6s 45c	+3s 63c145%	244	525
Pattern: Green Woolen BagBuy 6s, sell 15s 40c	6s	15s 40c	+8s 63c144%	41	50
Royal TeaBuy 2s, sell 5s	2s	5s	+2s 75c138%	554	127
Iron Shield SpikeBuy 7s 25c, sell 17s 93c	7s 25c	17s 93c	+9s 78c135%	150	40
Torn Bear PeltBuy 3s 89c, sell 9s 50c	3s 89c	9s 50c	+5s 14c132%	596	303
Black PearlBuy 29s 41c, sell 71s 82c	29s 41c	71s 82c	+38s 82c132%	832	547
Lesser Mystic WandBuy 30s 99c, sell 73s	30s 99c	73s	+38s 36c124%	48	62
Deviate FishBuy 80c, sell 1s 87c	80c	1s 87c	+98c122%	1,289	2,038
Clay RingBuy 30s, sell 70s	30s	70s	+36s 50c122%	39	40
Formula: Minor Wizard OilBuy 6s, sell 14s	6s	14s	+7s 30c122%	22	25
Tribal VestBuy 3s 90c, sell 9s	3s 90c	9s	+4s 65c119%	32	46
Ritual BeltBuy 3s 47c, sell 8s	3s 47c	8s	+4s 13c119%	33	32
Waylaid Crate: Earthly Expert HerbsBuy 2s 19c, sell 4s 98c	2s 19c	4s 98c	+2s 54c116%	185	147
MarefoilBuy 2g 99s, sell 6g 75s	2g 99s	6g 75s	+3g 42s 25c114%	22	21
Fel LeatherBuy 13s 44c, sell 30s	13s 44c	30s	+15s 6c112%	1,156	1,336
Viridian BandBuy 30s, sell 66s 11c	30s	66s 11c	+32s 80c109%	47	67
Essence of EarthBuy 4g 99s 98c, sell 11g	4g 99s 98c	11g	+5g 45s 2c109%	52	23
Waylaid Crate: Expert TextilesBuy 2s 25c, sell 4s 90c	2s 25c	4s 90c	+2s 40c107%	205	183
Waylaid Crate: Apprentice IngotsBuy 4s 90c, sell 10s 46c	4s 90c	10s 46c	+5s 4c103%	62	101
Heavy DynamiteBuy 3s 74c, sell 7s 98c	3s 74c	7s 98c	+3s 84c103%	104	97

Buy on Alliance, sell on Horde NA Normal Alliance → NA Normal Horde, 5% cut

Item	Buy	Sell	Gap after cut	To buy	Listed there
Grave MossBuy 2s 25c, sell 6s 95c	2s 25c	6s 95c	+4s 35c193%	3,468	1,478
Scroll of Liminal PassageBuy 7s 99c, sell 24s	7s 99c	24s	+14s 81c185%	291	173
Arcane PowderBuy 3s 98c, sell 11s 95c	3s 98c	11s 95c	+7s 37c185%	27	45
Pilferer's GlovesBuy 35s, sell 1g 5s	35s	1g 5s	+64s 75c185%	24	51
Red Ribboned Wrapping PaperBuy 50c, sell 1s 50c	50c	1s 50c	+92c185%	43	211
Plain Ol' PaletuskBuy 1s 71c, sell 4s 99c	1s 71c	4s 99c	+3s 3c177%	690	35
Crocolisk GumboBuy 1s 7c, sell 3s 7c	1s 7c	3s 7c	+1s 85c173%	216	107
Globe of WaterBuy 35s, sell 1g	35s	1g	+60s171%	260	103
ShellfishBuy 15s 99c, sell 45s 43c	15s 99c	45s 43c	+27s 17c170%	292	261
Pattern: Pilferer's GlovesBuy 6s 39c, sell 18s	6s 39c	18s	+10s 71c168%	25	40
Craftsman's Writ: Mechanical DragonlingBuy 2s 50c, sell 7s	2s 50c	7s	+4s 15c166%	42	37
Soldier's GirdleBuy 3s, sell 8s 20c	3s	8s 20c	+4s 79c160%	107	45
Limited Invulnerability PotionBuy 32s 50c, sell 86s	32s 50c	86s	+49s 20c151%	70	360
Waylaid Crate: Expert PartsBuy 2s 89c, sell 7s 48c	2s 89c	7s 48c	+4s 22c146%	290	88
Red Power CrystalBuy 5s, sell 12s 90c	5s	12s 90c	+7s 26c145%	303	317
Copper TubeBuy 1s 26c, sell 3s 25c	1s 26c	3s 25c	+1s 83c145%	385	635
Coyote MeatBuy 3s 70c, sell 9s 50c	3s 70c	9s 50c	+5s 32c144%	320	560
Shadow HoodBuy 55s, sell 1g 39s	55s	1g 39s	+77s 5c140%	21	65
Greater Healing PotionBuy 3s 74c, sell 9s 40c	3s 74c	9s 40c	+5s 19c139%	178	399
Craftsman's Writ: Fire GogglesBuy 2s 79c, sell 7s	2s 79c	7s	+3s 86c138%	23	25
Bandit CinchBuy 4s, sell 10s	4s	10s	+5s 50c138%	39	35
Craftsman's Writ: Iridescent HammerBuy 10s, sell 24s 98c	10s	24s 98c	+13s 73c137%	47	58
Tough Condor MeatBuy 6s 33c, sell 15s 75c	6s 33c	15s 75c	+8s 63c136%	288	89
Scroll of Spirit IVBuy 12s 45c, sell 30s 94c	12s 45c	30s 94c	+16s 94c136%	31	66
Scorpok PincerBuy 1g 20s, sell 2g 95s	1g 20s	2g 95s	+1g 60s 25c134%	114	53

How these are worked out

Prices are listed prices from the last hourly dump, not sales. A gap can close before you get there, and listing an item isn't selling it.
Buy and sell are near-lowest prices (the price of the cheapest 10% of units listed), so one stray cheap listing doesn't make a gap. Each side needs at least 20 units listed, to buy from and to sell against.
The gap is what a sale at the sell price brings in after the auction house's cut, minus the buy price. We haven't measured Forever's cut yet, so this assumes Classic's: 5% at a faction house and 15% at Blackwater. The deposit isn't counted. Only gaps from 10% to 200% after the cut are shown, at most 25 a table: a bigger gap is nearly always a few listings priced far above the market, which nobody buys.
A gap is shown only if it went the same way in the dumps about 24 hours earlier, so one that appeared this hour, and is probably gone soon, isn't.
Blizzard's data doesn't say which ruleset a house serves, so the names are inferred. They agree with BootyBayBroker's market labels and an in-game scan, but so far we've only confirmed EU PvP Alliance in game ourselves.