In the World of Warcraft, gain the extra WOW gold by trading is the best way to get the profit. The Epic and Rare equipment trading especially will make you receive much of World of Warcraft
money as reward. Before you begin the trade, you need pay some attention to some notices:
Deposit Fees
Never run a 24h auction, the deposit is 60% of the merchant buy price. Basically if you can sell an epic for 10 gold to a NPC, you will lose 6 gold every 24 hours if it doesn't sell, and if you think its pocket change, let's take another example.
You're selling 6 epic items and 20 rare items, during the day you sell 5 rare items for 20 gold profits each 100 gold and 1 epic for a 100 gold profit. Sadly, you had 122 wow gold of deposit fees, so you only won 82
World of Warcraft gold despite all your sales, but you would have won around 162 gold if you used 8 hours auction.
Know when to sell
As I said, you need to run 8 hours long auction to save money, the best time to sell is usually 05:00 PM (17:00) to 01:00 AM (01:00). It will cover people, who start playing after work, and it will also cover the end of most of the raids, if your server is highly populated with raiding guilds you will often see sales around 00:00 or 00:30 when people need to refuel their backpacks for tons of expensive things.
These people sometimes also buy a few rare items or two for an alt or something.
Crafting is good
Burning Crusade has tons of crafted items, be careful if you plan to buy them by
cheap wow gold for reselling. People are usually already making a profit on them, and it will be very hard to make even more money from this kind of item. Luckily for you there is a nice list of bind on equip items on this website.
Still, you can check the prices of reagents to make the epic crafted items that look nice to you, and see if there's a nice profit to make. Then it's not really hard to find someone who can make it, just ask to your friend list or people you may know a little in "big" guilds, you will nearly always find a name less than 5 minutes.