The first thing to look for in a guide is to find out how much gold they bring in to you. Most guide promises players a certain amount of gold per hour. Do not be fooled by those guides that promise you huge amounts. Good gold guides will tell you that you should not be limited by hourly gold rates. For example, some guides will promise to you thousands of gold per hour. In reality, you should not limit yourself to earning this amount. You can earn even more than that.
Reliable guides must also have a good auction house farming technique. A lot of players think that the auction house is about "buying low and selling high". There is more to that than what you think. When you buy an item at a low price and try to sell it at a higher price, there will only be a few who will buy your stuff. Buyers who are looking for a good buy will search WoW for bargain prices. Hence, you will easily be crossed out of their list.
Farming gold and earning a lot may not seem that simple. That's why it is vital that you get your hands on guides that really work. Most gold guides that are available for free in the internet have already become outdated and inefficient. By the time you try those techniques, a lot have already done that which makes it ineffective.
Go for gold guides with prices. They come with a price because they were developed by certified experts on WoW. Hence, it is really important that you read a World of Warcraft gold guide review before you buy.
A World of Warcraft gold guide review will help you get the best gold farming technique. You can be assured that your money will not go to waste on some cheap and outdated technique. Doing a little reading is better than not having the best technique that devoted WoW players like you deserve.