(My first post in this forum. (I'm sorry for my bad english.)
1. Install Auctioneer addon.
2. Scan regularly the AH.
3. Watch average prices, but keep in mind there are inflated prices on purpose, i.e flooding market (for example) with same item on stack at 1 on 100k gold each.
4. Monopolize the market and speculate with the prices. Watch for items with high demand and relatively low supply. That includes level 90 epics (you can buy these items for 30-70k and sell them for 120-170k gold. Buy mostly if there's no competition. That makes you a monopolist.), COBBALT ORE (BAR) and FEL IRON ORE (BAR) for example can be gold mine. Because their low supply you, high rates server and high population you can sell their bars at 20, even 30k gold if there's no competition. If there is a silly competitor who sells low supply items on prices
5. What I watch when I want to buy on THAT price: odds (this is originally my idea) vs percents. If there are 10 x some item on 60% of your price (you successfully sell on!), that means you have 25% profit of that price (AH cut=15%). You must sell 100%-25%=75% of that amount (10) at some moment (8 of 10) to return your previous gold, because you want to return your gold as soon as possible to continue with buying and monopolizing. Every piece over that number gives you a profit.
6. Watch for inscription cards. They are gold mine too, despite their price is hardly predictive and buy-resell can be very hard (btw you can post them on AH for weeks on inflated prices (for example 400% of their price and then you post them on 200% of the normal price and people are happy about that discount... (That applies to nearly all items.)
7. Keep in mind that you're playing on high population server. Monopolizing is hard because you must buy all available supply (at cosmic prices because this is high rates server).
8. Don't be afraid to give your last gold for a very lucrative bargain.
9. Don't undercut too much!!! Very often best way of undercutting is -1 copper. If you sell with 30% profit but you undercut with 15% of your price that means you lose 50% of your expected profit.
10. Don't sell at very low price! (And maybe stop selling herbs if there's many competitors.) Don't waste your time at farming and selling just for cents. You can spend this time for search, buy and resell items for profit. Search for (relatively) free niche!
11. If there are glyphs with average price 10k and lowest price is 9k and you see such glyph for 2-4k, you can smoothly sell it for ~8k (or 8999g99s99c).
12. If you want to save the price (applies to items with low supply and high demand), you can help to competition in this way. If he sell that for 50k, you can post your item at 100k. His item will be sold early and after that your item can be bought at higher price (if you are the only seller for it). This is hardly practicable on this realm because here are 5200 people online.
13. One example: If in the world is only 1 apple it will be very expensive because it is very very rare. Then you can sell that apple to me for 1 million thinking that is high enough price. But I will sell it for 50 millions (but in WoW NEVER WITHOUT BUYOUT, NEVER!!!) or more. If it doesn't sell for week, I can post it for months. There's nobody who can competite me. Sooner or later I'll sell it for MY PRICE, if I don't want to sacrifice my profit, because every discout reduces the profit. If I don't need this pile of money at the moment (but only for my financial stability) I can sell it for 100 millions. I can wait a year or more but I'll get these 100 millions. You can make 1 milion for 1 day, I can make 100 millions for 2 years (average 1 million daily vs 140k daily) but that doesn't means life can bring you such a expensive apple every day, even 7 times less, it's statistically impossible.
14. Don't sell same thing every time at same price. Adjust yourself to competitors. If there's no supply, increase astronomically the price (if it's possible). This is where shitloads of money come from. If you buy the competitor's stock you reset the price, you can determine it! Sometimes you can sell for x2 average price, sometimes you can't (for example cloth sometimes because there's high supply).
15. Choose stacks of 20 over stacks of 7 or 17. Choose stacks of 20 over stacks of 1. People don't want to buy materials individially, they could buy this stack if it's more expensive.
16. Keep in mind that commercial sector is dirty work. To win somebody has to lose. You both can not simultaneously to bring maximum profit. Every LARGE profit ruins the server economy. Profit for someone can means misery for someone. It's not profit if all prices are increasing accordingly. It's profit if you can increase your prices more than prices of items you need every day. The greed makes us tradespeople. The greed makes us people. Very very sad!
PS: Farming increases supply, reselling not. Prefer buy and sell!
