Auction house flips on NA Normal Horde

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 53 min ago (13 Nov 23:17 UTC)

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

Item	Buy	Sell	Gap after cut	To buy	Listed there
Scroll: PEATCHY ATTAXBuy 1s 40c, sell 3s 50c	1s 40c	3s 50c	+1s 92c138%	40	205
Boar RibsBuy 3s 33c, sell 8s	3s 33c	8s	+4s 27c128%	33	191
Scroll: TOPAZ YORAKBuy 1s 99c, sell 3s 69c	1s 99c	3s 69c	+1s 52c76%	42	225
Scroll: SHOOBEEDOOPBuy 2s 50c, sell 3s 99c	2s 50c	3s 99c	+1s 29c52%	34	178
Scroll: UPDOGBuy 2s 22c, sell 3s 29c	2s 22c	3s 29c	+91c41%	58	288
Heavy Blasting PowderBuy 2s 97c, sell 4s 38c	2s 97c	4s 38c	+1s 19c40%	45	784
Large FangBuy 1s, sell 1s 43c	1s	1s 43c	+36c36%	315	2,923
Stonescale EelBuy 95c, sell 1s 34c	95c	1s 34c	+32c34%	790	3,529
Scroll: WUBBA WUBBABuy 1s 80c, sell 2s 39c	1s 80c	2s 39c	+47c26%	35	53
Tender Crocolisk MeatBuy 1s, sell 1s 24c	1s	1s 24c	+18c18%	418	2,158
Bolt of Silk ClothBuy 8s, sell 9s 52c	8s	9s 52c	+1s 4c13%	219	1,954

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

Item	Buy	Sell	Gap after cut	To buy	Listed there
Lesser Cleric's ElixirBuy 5s 75c, sell 20s	5s 75c	20s	+11s 25c196%	134	34
Waylaid Crate: Apprentice TextilesBuy 8s 50c, sell 29s 50c	8s 50c	29s 50c	+16s 58c195%	106	65
Medium Armor KitBuy 2s 45c, sell 8s 49c	2s 45c	8s 49c	+4s 77c195%	128	85
Precision ArrowBuy 29c, sell 1s	29c	1s	+56c193%	3,701	156
Lesser Arcane ElixirBuy 5s 87c, sell 20s	5s 87c	20s	+11s 13c190%	443	76
Thorium BarBuy 28s, sell 95s	28s	95s	+52s 75c188%	465	58
Greater Astral EssenceBuy 15s 67c, sell 52s 99c	15s 67c	52s 99c	+29s 37c187%	387	83
Minor Troll's Blood ElixirBuy 33c, sell 1s 10c	33c	1s 10c	+60c183%	603	60
Uncommon Herb SeedsBuy 1s 50c, sell 5s	1s 50c	5s	+2s 75c183%	399	26
Thick HideBuy 5s 17c, sell 17s	5s 17c	17s	+9s 28c179%	743	107
Copper ModulatorBuy 5s 58c, sell 18s 23c	5s 58c	18s 23c	+9s 92c178%	463	36
Buzzard WingBuy 4s, sell 12s 99c	4s	12s 99c	+7s 4c176%	2,130	170
Elixir of AgilityBuy 6s 10c, sell 19s 55c	6s 10c	19s 55c	+10s 52c172%	1,100	110
Elemental EarthBuy 17s 23c, sell 55s	17s 23c	55s	+29s 52c171%	830	72
Barbecued Buzzard WingBuy 7s 89c, sell 25s	7s 89c	25s	+13s 36c169%	892	398
Green Iron BracersBuy 14s 86c, sell 47s	14s 86c	47s	+25s 9c169%	107	38
Scroll of Stamina IIBuy 1s 11c, sell 3s 50c	1s 11c	3s 50c	+1s 86c168%	95	24
PyriteBuy 1s 90c, sell 5s 96c	1s 90c	5s 96c	+3s 17c167%	530	325
Cured Light HideBuy 1s 90c, sell 5s 88c	1s 90c	5s 88c	+3s 10c163%	632	87
Bear MeatBuy 39c, sell 1s 19c	39c	1s 19c	+62c159%	761	70
Greater Mystic EssenceBuy 37s 97c, sell 1g 14s	37s 97c	1g 14s	+58s 93c155%	334	64
Small Leather Ammo PouchBuy 1s, sell 3s	1s	3s	+1s 55c155%	172	23
ShadowgemBuy 2s 99c, sell 8s 90c	2s 99c	8s 90c	+4s 58c153%	110	147
Deeprock SaltBuy 2s 85c, sell 8s 40c	2s 85c	8s 40c	+4s 29c151%	2,240	66
AquamarineBuy 13s 90c, sell 40s 85c	13s 90c	40s 85c	+20s 82c150%	331	54

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
Fel LeatherBuy 13s 44c, sell 39s	13s 44c	39s	+23s 61c176%	979	1,465
Tribal VestBuy 3s 45c, sell 10s	3s 45c	10s	+6s 5c175%	34	42
Scroll of Cat FamiliarBuy 2s 44c, sell 6s 99c	2s 44c	6s 99c	+4s 20c172%	83	291
Healing PotionBuy 1s 2c, sell 2s 92c	1s 2c	2s 92c	+1s 75c172%	540	419
Craftsman's Writ: Big Voodoo RobeBuy 20s, sell 55s 69c	20s	55s 69c	+32s 91c165%	23	22
Red Wolf MeatBuy 2s 45c, sell 6s 77c	2s 45c	6s 77c	+3s 98c163%	390	1,141
Raw Mithril Head TroutBuy 38c, sell 1s 3c	38c	1s 3c	+60c158%	4,089	6,618
Instant Poison IIIBuy 3s, sell 8s	3s	8s	+4s 60c153%	108	104
Torn Bear PeltBuy 3s 80c, sell 10s	3s 80c	10s	+5s 70c150%	498	159
Packet of Tharlendris SeedsBuy 2s 50c, sell 6s 45c	2s 50c	6s 45c	+3s 63c145%	281	414
Field GuideBuy 4s 97c, sell 12s 75c	4s 97c	12s 75c	+7s 14c144%	51	46
Essence of AirBuy 3g 99s 97c, sell 10g	3g 99s 97c	10g	+5g 50s 3c138%	96	21
Royal TeaBuy 2s, sell 5s	2s	5s	+2s 75c138%	651	98
Lesser Mystic WandBuy 30s 99c, sell 74s	30s 99c	74s	+39s 31c127%	59	55
IronfeatherBuy 1s 50c, sell 3s 54c	1s 50c	3s 54c	+1s 86c124%	733	715
Recipe: Savory Deviate DelightBuy 84s 98c, sell 1g 99s	84s 98c	1g 99s	+1g 4s 7c122%	44	33
Formula: Minor Wizard OilBuy 6s, sell 14s	6s	14s	+7s 30c122%	26	41
Seeping GizzardBuy 3s, sell 7s	3s	7s	+3s 65c122%	20	22
Soft Frenzy FleshBuy 69c, sell 1s 57c	69c	1s 57c	+80c116%	140	59
Large Brilliant ShardBuy 2g 28s 99c, sell 5g 15s	2g 28s 99c	5g 15s	+2g 60s 26c114%	87	117
Clay RingBuy 32s, sell 70s	32s	70s	+34s 50c108%	41	38
Heavy DynamiteBuy 3s 74c, sell 7s 98c	3s 74c	7s 98c	+3s 84c103%	107	105
Scroll: KEEP CLEF FOCIBuy 25s, sell 53s	25s	53s	+25s 35c101%	36	59
Elemental FireBuy 19s, sell 40s	19s	40s	+19s100%	227	469
Iron Shield SpikeBuy 7s 25c, sell 15s	7s 25c	15s	+7s97%	160	61

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

Item	Buy	Sell	Gap after cut	To buy	Listed there
Arcane PowderBuy 3s 98c, sell 11s 95c	3s 98c	11s 95c	+7s 37c185%	26	45
Red Ribboned Wrapping PaperBuy 50c, sell 1s 50c	50c	1s 50c	+92c185%	43	191
ShellfishBuy 15s 99c, sell 45s 43c	15s 99c	45s 43c	+27s 17c170%	317	243
Clam MeatBuy 50c, sell 1s 41c	50c	1s 41c	+84c168%	664	1,557
Draught of Water BreathingBuy 1s 65c, sell 4s 65c	1s 65c	4s 65c	+2s 77c168%	150	531
Pattern: Pilferer's GlovesBuy 6s 39c, sell 18s	6s 39c	18s	+10s 71c168%	25	45
Green Whelp ScaleBuy 4s 79c, sell 13s 30c	4s 79c	13s 30c	+7s 84c164%	48	260
Coyote MeatBuy 3s 45c, sell 9s 50c	3s 45c	9s 50c	+5s 58c162%	521	720
Copper TubeBuy 1s 23c, sell 3s 35c	1s 23c	3s 35c	+1s 95c159%	325	681
Oil of OlafBuy 1s 49c, sell 3s 97c	1s 49c	3s 97c	+2s 28c153%	512	57
Limited Invulnerability PotionBuy 32s 50c, sell 86s	32s 50c	86s	+49s 20c151%	91	376
Plain Ol' PaletuskBuy 1s 71c, sell 4s 49c	1s 71c	4s 49c	+2s 56c149%	678	140
Red Power CrystalBuy 5s, sell 12s 95c	5s	12s 95c	+7s 30c146%	145	254
Shadow HoodBuy 54s, sell 1g 39s	54s	1g 39s	+78s 5c145%	30	62
Frost Protection PotionBuy 13s 99c, sell 35s 75c	13s 99c	35s 75c	+19s 97c143%	103	28
Grave MossBuy 3s 50c, sell 8s 88c	3s 50c	8s 88c	+4s 94c141%	2,902	1,283
Lesser Troll's Blood ElixirBuy 89c, sell 2s 23c	89c	2s 23c	+1s 23c138%	227	1,249
Globe of WaterBuy 40s, sell 1g	40s	1g	+55s138%	280	111
Scroll of Spirit IVBuy 12s 50c, sell 30s 94c	12s 50c	30s 94c	+16s 89c135%	20	62
Savory Whimsyfin DelightBuy 2s 27c, sell 5s 50c	2s 27c	5s 50c	+2s 96c130%	572	352
Catseye DraughtBuy 3s 98c, sell 9s 50c	3s 98c	9s 50c	+5s 4c127%	196	820
Craftsman's MonocleBuy 50s, sell 1g 19s	50s	1g 19s	+63s 5c126%	26	24
Recipe: Lesser Stoneshield PotionBuy 7s 98c, sell 18s 89c	7s 98c	18s 89c	+9s 97c125%	32	42
Gnomish Universal RemoteBuy 38s, sell 89s	38s	89s	+46s 55c123%	64	36
Red Whelp ScaleBuy 4s 25c, sell 9s 90c	4s 25c	9s 90c	+5s 16c121%	854	262

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.