Auction house flips on EU 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 20 min ago (14 Nov 02:18 UTC)

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

Item	Buy	Sell	Gap after cut	To buy	Listed there
Scroll: UPDOGBuy 1s 98c, sell 6s 24c	1s 98c	6s 24c	+3s 95c199%	92	241
Scroll: SHOOBEEDOOPBuy 2s 28c, sell 6s 88c	2s 28c	6s 88c	+4s 26c187%	85	127
Scroll: THAW WORDSBuy 2s 88c, sell 8s 50c	2s 88c	8s 50c	+5s 20c180%	85	300
Lightning in a BottleBuy 3s, sell 7s 95c	3s	7s 95c	+4s 55c152%	60	93
Green Hills of Stranglethorn - Page 14Buy 4s 25c, sell 9s 90c	4s 25c	9s 90c	+5s 16c121%	139	667
Green Hills of Stranglethorn - Page 24Buy 9s, sell 16s 97c	9s	16s 97c	+7s 12c79%	185	550
Scroll: STHENIC LUNATEBuy 1s 20c, sell 2s	1s 20c	2s	+70c58%	67	69
Mystic Heavy Armor KitBuy 8s, sell 12s 84c	8s	12s 84c	+4s 20c52%	51	85
Waylaid Crate: Apprentice PartsBuy 2s 99c, sell 4s 47c	2s 99c	4s 47c	+1s 26c42%	78	428
Rugged LeatherBuy 11s 30c, sell 16s 59c	11s 30c	16s 59c	+4s 46c39%	524	1,695
Jungle RemedyBuy 6s, sell 8s 50c	6s	8s 50c	+2s 8c35%	339	941
Green Hills of Stranglethorn - Page 1Buy 5s, sell 6s 70c	5s	6s 70c	+1s 36c27%	136	690
Raptor HideBuy 2s 29c, sell 2s 98c	2s 29c	2s 98c	+54c24%	451	348
Heavy LeatherBuy 1s 86c, sell 2s 35c	1s 86c	2s 35c	+37c20%	3,552	1,974
Heavy StoneBuy 2s 89c, sell 3s 48c	2s 89c	3s 48c	+42c14%	3,101	7,018
Wool ClothBuy 95c, sell 1s 13c	95c	1s 13c	+12c13%	3,061	12,799

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

Item	Buy	Sell	Gap after cut	To buy	Listed there
Lion MeatBuy 1s 65c, sell 5s 80c	1s 65c	5s 80c	+3s 28c199%	1,072	467
Slimy SmoothieBuy 1s 42c, sell 4s 99c	1s 42c	4s 99c	+2s 82c199%	241	57
SaltBuy 57c, sell 2s	57c	2s	+1s 13c198%	1,326	387
FirebloomBuy 7s 97c, sell 27s 94c	7s 97c	27s 94c	+15s 78c198%	711	438
Mithril CasingBuy 20s 98c, sell 73s 37c	20s 98c	73s 37c	+41s 38c197%	107	29
Scroll of Protection IIIBuy 2s 49c, sell 8s 70c	2s 49c	8s 70c	+4s 90c197%	82	25
White Spider MeatBuy 2s 84c, sell 9s 86c	2s 84c	9s 86c	+5s 54c195%	251	77
Rough Crocolisk ScaleBuy 81c, sell 2s 80c	81c	2s 80c	+1s 57c194%	122	83
Snapvine WatermelonBuy 29c, sell 1s	29c	1s	+56c193%	78	38
Double-Stitched Woolen ShouldersBuy 4s 38c, sell 14s 99c	4s 38c	14s 99c	+8s 36c191%	223	23
Troll's Blood ElixirBuy 3s 69c, sell 12s 49c	3s 69c	12s 49c	+6s 93c188%	426	45
Waylaid Crate: Expert PartsBuy 1s 19c, sell 3s 99c	1s 19c	3s 99c	+2s 20c185%	540	139
Scroll of Agility IIBuy 2s 98c, sell 9s 98c	2s 98c	9s 98c	+5s 50c185%	120	72
Sulfuric AcidBuy 4s 50c, sell 14s 99c	4s 50c	14s 99c	+8s 24c183%	496	205
Nightfin SoupBuy 6s 45c, sell 21s 45c	6s 45c	21s 45c	+11s 78c183%	1,397	114
Pattern: Deviate Scale BeltBuy 9s 99c, sell 32s 59c	9s 99c	32s 59c	+17s 71c177%	27	20
Anti-VenomBuy 31c, sell 1s	31c	1s	+54c174%	3,185	92
Fel LeatherBuy 30s 80c, sell 99s	30s 80c	99s	+53s 35c173%	1,909	32
Rumsey Rum LightBuy 50c, sell 1s 59c	50c	1s 59c	+85c170%	371	109
Holy Protection PotionBuy 63c, sell 2s	63c	2s	+1s 7c170%	1,195	80
Elixir of Minor StrengthBuy 77c, sell 2s 44c	77c	2s 44c	+1s 30c169%	584	72
Clam MeatBuy 34c, sell 1s 5c	34c	1s 5c	+55c162%	2,272	704
Bronze FrameworkBuy 7s 40c, sell 22s 75c	7s 40c	22s 75c	+11s 94c161%	489	43
Camp TentBuy 1s 98c, sell 6s	1s 98c	6s	+3s 12c158%	985	474
Scroll of SpiritBuy 63c, sell 1s 90c	63c	1s 90c	+98c156%	397	57

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 EU Normal Horde → EU Normal Alliance, 5% cut

Item	Buy	Sell	Gap after cut	To buy	Listed there
Green Hills of Stranglethorn - Page 6Buy 3s 95c, sell 12s 34c	3s 95c	12s 34c	+7s 77c197%	178	723
Craftsman's Writ: Nightscape ShouldersBuy 9s 90c, sell 30s 75c	9s 90c	30s 75c	+19s 31c195%	67	42
Pattern: Filigreed Pristine LeggingsBuy 11s, sell 34s	11s	34s	+21s 30c194%	27	20
Waylaid Crate: Journeyman PartsBuy 1s 59c, sell 4s 85c	1s 59c	4s 85c	+3s 2c190%	312	193
Craftsman's Writ: Orange Martial ShirtBuy 13s 89c, sell 40s 49c	13s 89c	40s 49c	+24s 58c177%	54	39
Roasted QuailBuy 5s 94c, sell 16s 99c	5s 94c	16s 99c	+10s 20c172%	46	273
Warbear LeatherBuy 31s 89c, sell 90s	31s 89c	90s	+53s 61c168%	287	240
Craftsman's Writ: Fire GogglesBuy 3s 98c, sell 10s 99c	3s 98c	10s 99c	+6s 46c162%	51	26
Instant Poison IIIBuy 2s, sell 5s 50c	2s	5s 50c	+3s 22c161%	326	97
Superior ShouldersBuy 19s, sell 52s 25c	19s	52s 25c	+30s 64c161%	27	51
Imperfect Draenethyst FragmentBuy 79s 98c, sell 2g 18s 23c	79s 98c	2g 18s 23c	+1g 27s 34c159%	57	50
Pattern: Filigreed Pristine GownBuy 11s, sell 30s	11s	30s	+17s 50c159%	26	35
Craftsman's Writ: Red Mageweave PantsBuy 13s 99c, sell 37s 99c	13s 99c	37s 99c	+22s 10c158%	29	78
Lesser Invisibility PotionBuy 1s 94c, sell 5s 20c	1s 94c	5s 20c	+3s155%	232	1,141
Waylaid Crate: Apprentice OreBuy 1s 50c, sell 3s 98c	1s 50c	3s 98c	+2s 28c152%	511	558
Barbaric Cloth GlovesBuy 1s 69c, sell 4s 44c	1s 69c	4s 44c	+2s 53c150%	86	23
Craftsman's Writ: Advanced Target DummyBuy 21s, sell 54s	21s	54s	+30s 30c144%	35	44
Craftsman's Writ: Star BeltBuy 7s 55c, sell 18s 99c	7s 55c	18s 99c	+10s 49c139%	71	64
Green Hills of Stranglethorn - Page 14Buy 3s 97c, sell 9s 90c	3s 97c	9s 90c	+5s 44c137%	359	667
Stylish Blue ShirtBuy 3s 50c, sell 8s 60c	3s 50c	8s 60c	+4s 67c133%	21	96
Barbaric Cloth BootsBuy 2s 70c, sell 6s 56c	2s 70c	6s 56c	+3s 53c131%	51	25
Large FangBuy 83c, sell 2s	83c	2s	+1s 7c129%	517	415
Pattern: Filigreed Pearly LeggingsBuy 6s 35c, sell 14s 99c	6s 35c	14s 99c	+7s 89c124%	31	22
Cracked WindstoneBuy 1s 27c, sell 2s 99c	1s 27c	2s 99c	+1s 57c124%	45	20
Mystic's BraceletsBuy 2s 89c, sell 6s 75c	2s 89c	6s 75c	+3s 52c122%	49	47

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

Item	Buy	Sell	Gap after cut	To buy	Listed there
Goblin Mail LeggingsBuy 9s, sell 28s	9s	28s	+17s 60c196%	29	20
Maker's SparkBuy 2g 99s, sell 9g 10s 99c	2g 99s	9g 10s 99c	+5g 66s 44c189%	29	47
Fillet of FrenzyBuy 1s, sell 3s	1s	3s	+1s 85c185%	215	49
Wildvine PotionBuy 5s, sell 15s	5s	15s	+9s 25c185%	104	360
Heavy Scorpid ScaleBuy 20s, sell 59s 90c	20s	59s 90c	+36s 90c185%	110	471
Plans: Inlaid Mithril CylinderBuy 98s 98c, sell 2g 95s 99c	98s 98c	2g 95s 99c	+1g 82s 21c184%	40	21
Scroll: KEEP CLEF FOCIBuy 20s, sell 59s	20s	59s	+36s 5c180%	71	60
Seasoned Wolf KabobBuy 1s 8c, sell 3s 18c	1s 8c	3s 18c	+1s 94c180%	108	467
Plain Ol' PaletuskBuy 1s 94c, sell 5s 48c	1s 94c	5s 48c	+3s 27c168%	779	1,508
Bottled ScreamsBuy 3g 22s 95c, sell 8g 98s 99c	3g 22s 95c	8g 98s 99c	+5g 31s 9c164%	100	69
Lambent Scale PauldronsBuy 21s, sell 58s	21s	58s	+34s 10c162%	30	38
Recipe: Minor Cleric's ElixirBuy 3s 20c, sell 8s 67c	3s 20c	8s 67c	+5s 4c157%	149	44
Oil of OlafBuy 75c, sell 2s	75c	2s	+1s 15c153%	712	101
Spellblasting PotionBuy 3s 79c, sell 10s 5c	3s 79c	10s 5c	+5s 76c152%	146	205
Blueprint: AnvilBuy 1g 9s, sell 2g 88s 88c	1g 9s	2g 88s 88c	+1g 65s 44c152%	48	32
Cookie's FeastBuy 9s 50c, sell 24s 95c	9s 50c	24s 95c	+14s 20c150%	26	84
Copper TubeBuy 1s 20c, sell 3s	1s 20c	3s	+1s 65c138%	673	1,056
Libram of RapidityBuy 2g, sell 5g	2g	5g	+2g 75s138%	21	32
Crocolisk SteakBuy 1s 49c, sell 3s 70c	1s 49c	3s 70c	+2s 2c136%	822	344
Elixir of Lesser IntellectBuy 3s 99c, sell 9s 80c	3s 99c	9s 80c	+5s 32c133%	123	22
Coyote MeatBuy 4s 2c, sell 9s 74c	4s 2c	9s 74c	+5s 23c130%	351	751
Lesser Troll's Blood ElixirBuy 79c, sell 1s 90c	79c	1s 90c	+1s 2c128%	766	1,289
ShellfishBuy 19s, sell 45s 45c	19s	45s 45c	+24s 18c127%	491	991
Steel BreastplateBuy 63s, sell 1g 50s 50c	63s	1g 50s 50c	+79s 98c127%	30	27
Devilsaur LeatherBuy 63s, sell 1g 49s 90c	63s	1g 49s 90c	+79s 40c126%	588	911

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.