BS does not make much gold.
Arcanite Reaper is not a good profit producer, many people will have the pattern and the most expensive mats are actually from Alchemy, your entire profit would be a crafting fee which would be maybe 10g and you’d craft maybe 1-3 a week.
The money in BS comes from rare patterns and reputation patterns.
- Nightfall - Reputation with thorium brotherhood (iirc), easy 50g crafting fee
- Lionheart Helmet - Rare pattern, BiS helmet for fury warriors, and there will be tons of those. You can charge 20-50g crafting fee depending on how many have the pattern, you can also make and sell the helmets, which will still sell often enough.
- Dark Iron Armor (BoE items, FR gear) Reputation with thorium brotherhood, can charge 25-50g per craft, highly sought after for FR tank sets
- Sulfuron Hammer, required to make Hand of Rag, can charge easily 100g fee to craft as it requires a trip to BRD just to craft, and the pattern costs 1 sulfuron ingot just to learn (estimated value ~1000g).
- Serenity, a blue mace that has a chance on hit to dispell a buff from the enemy target, used by pvpers, can charge a 20g fee to craft but you won’t really sell to many crafts
- Elemental Sharpening Stone, huuuuuuuuge profits if you get this early on. Rare pattern from from Molten core bosses, 2% crit stone melee can apply to their weapons. First person on server to get this can charge about 5g to make 20 or so, every melee on server will headhunt you to craft these for them.
- Dense Sharp/Weight stones, alternative to elemental stones, still net a decent profit, easy to make, jsut sell em on the AH.
- Moonsteel Broadsword, used for a quest in dustwallow marsh, decent profit for low level
- Patterned Bronze Bracers, used for a quest in Badlands to get the Nifty Stopwatch trinket (might not actually be tied to the trinket quest, but still good for exp, cant remember), good profit as people will buy em off the ah before heading to Badlands
- Mithril Spurs, can charge a small fee to attach spurs to people mount-set boots
- Titanic Leggings, if this pattern exists at server launch, you’ll craft tons of em, BiS till naxx for fury warriors, but it shouldnt be available until naxx patch i think. Either way, 25-50g crafting fee depending on how many patterns are kicking around.
There may be more im missing, but as you can see, most of BSing sales come from crafting fees and not the items themselves. Most players will farm the mats themselves and pay the fee as opposed to paying to very high retail value of the item on the AH.