(1) Killer Guides - Killer Guides is one of the best guide sites out there for strategies on how to level and play your class effectively not just for wow but for many games. This company has been around for a long time and sells a lot of guides. The guides they sell cover in depth information on how to play different classes, to leveling guides or even gold farming secrets. Most guides here sell for 29.99 each but for 89.99 they have a special package and will send you all 21 of their World of Warcraft Guides.
(2) Zygor Guides - Leveling and profession guide, it has a lot of features, bonus guides and other things built in. There is an UI that is included that will help you level and is compatible with Carbonit e. The cost for this guide for one faction is $40 or $60 if you want to buy it for both Horde and alliance factions. It is well worth checking out. They also have guides for obtaining pets, mounts, daily quest guides, gear guides, etc. Well worth checking out.
(3) Gold Secrets - Gold Secrets is the incredible unofficial gold-generating guide for World of Warcraft. It’s been used by thousands of WOW gamers for nearly 6 years. This guide is being sold for $27 and is a really good wow gold guide.