This farm almost did not make this list. Even though I have had only a little luck with it, it seems to be gathering some popularity in the gold farming community. Although I feel with the recent changes in 7.3, this farm is very close to dying out. Generally what you want to to do is pull every mob you can as you venture to the last boss in the instance. The only saving grace of this farm (if you can call it that) is that some mobs are GUARANTEED to drop greens. Guaranteed. Whether or not they drop profitable greens is a different question, however it's a must-mention quirk you get from running this instance. It also allows you to get your hands on some rare low level blues.
As an example, I know that prices for Goblin Glider Kits fluctuate a lot. I used to sell mine for around 30-40 gold each about 2 months ago, but recently the market was flooded with them so the price is down to under 10g each on my server. By experience I am pretty certain that the prices will go up again, so right now I am hoarding them on one alt, both by making them myself and by buying them on the AH when they are really cheap. As soon as the price goes back over 20g I will start unloading them for a profit.
You can earn a decent amount of XP by doing Herbalism or mining. Any zone works but I prefer Sholazar Basin as a lot of the mobs are not aggressive and the mobs are spread out so you will find a lot of herbs and ore that you don’t have to fight for. It is possible to make about a level every hour by doing this, or a level every 30-40 minutes with rest XP.
The NPC scan and NPC alert method is an awesome way to build a stock of rare BOE items simply because you don't really have to try. By installing NPC scan and NPC alerts, you can literally just fly over anywhere and be alerted when you pass a rare spawn. As we all know, rare spawn loot tends to have higher item vales, as not everyone is able to consistently farm them. Some NPC's, especially those in outlands have those higher item values when compared to the rest of the world. As a goldmaking method I just everyone should be doing this. It only requires you download two addons and you can get access to important NPC,s that you would otherwise never knew existed. The opportunities are endless, I would generally never play without these cool addons. Realy cool.
You will need to cover very large areas in order to get a few chests as they are quite rare. Vanilla, TBC and WotLK zones work best. The way I like to do it is to park one Rogue class trial in Outland and one in Northrend, then fly over the whole continent and look for chests. One whole run might only yield 3-10 chests but you will still make a bunch of gold as you are almost guaranteed rares in chests in these zones.
AWESOME spot.. if you are a druid, here's why. This spot takes place on an island in the very north part of Stormheim, which is surrounded by water. In this water are 2 groups of crabs that roam in packs of 12. Each of these crabs can be skinned for scales and with the usual perks I mentioned in the earlier skinning spots. (See spot 13). The only catch is sometimes the crabs are very far apart and require some travelling to get to. Druid travel forms not only have increased swim speed, but the wild charge ability allows you to swim 150% faster for 10 seconds, all the while replenishing your breath meter. Pretty cool right? I found that druids are AWESOME for farming this spot and can easily outclass other farmers here. It's a druid spot that limits the competition – while ensuring you have the most uptime. Very cool. Gutting and level 3 stormscale skinning recommended.