Create a Bank Alt and level it up to level 5 - The leveling part is very important because you can pick up Enchanting after you reach it. In Classic, you can disenchant EVERY uncommon item of every level, if you have the enchanting profession. Disenchanting weak BoE Uncommon Items and selling Enchanting Materials on AH will help you make some extra money out of otherwise Vendor-destined gear. The Bank Alt will also serve as your high-capacity storage for various items* that are bound to rise in value over time or might come in handy at a later date. Overall, this is a must-have, as it will improve your overall leveling and Gold-making efficiency, let you store additional items, allow you to consolidate your Gold on a single character, and provide you with a way of squeezing some extra Gold out of various Items.
Swamp Jaguars - Western part of the Swamp of Sorrows is inhabited by deadly feline species, the Swamp Jaguar. These big cats drop a lot of Vendor Trash Items (Long Soft Tail and Bristly Whisker), Large Fangs (used in Leatherworking, Blacksmithing, and Alchemy Recipes), Wicked Claws (used in Leatherworking and Blacksmithing Recipes), 12 Slot Bags, and most importantly can be Skinned for Heavy Leather and Thick Leather (Skinning is not necessary for this spot, because of Jaguar's already great loot table). This is one of the best spots for farming your Level 40 Mount Gold. Recommended level - 35+ (you might need to clear other Swamp creatures as well, just to be safe).
Swim Speed Potions (used especially at lvl 37 for Faldir's Cove in Arathi Highlands and lvl 57 in WPL). Try to get multiple stacks of these. I also recommend keeping a stack of these always in your bags. You will frequently pass rivers and lakes and can use these potions to pass them faster through out the guide. Please note that these potions do not stack with Druid's Aquatic Form and Glyph of Aquatic Form.
Some quests in my guide are marked as "SKIP" and colored in red. These quests are simply either too hard to solo or not worth the XP/time and are skipped. My guide will only list SKIPPED quests if the quest is a direct follow up after completing a quest, not one that you have to click the NPC again to get it. If you hover over the skipped quests, it will give info on why it is skipped in the guide (unless that info is already listed directly in the guide text).
There are 5 Dreaming whelps and 7 adolescent whelps spawns, They drop the small flame sack which sells for a decent amount at auction house or can be used to make fire protection potions. The sacks have around 10% chance to drop and it's one of the main reasons you want to grind here. On top of this you'll get lots of grey items, green and blues with a higher chance than your average mob. If you are not aware yet, dragonkins have the best loot table in the game while having less HP and armor... making them easier to kill, assuming you're not fighting elites...
Check Item's Vendor Price before posting it on the Auction House - Selling items on the Auction House below their Vendor value is a common mistake. Avoid it like fire, and always make sure that you are not losing Gold on your Auctions. If you plan to sell an item on the AH for a price just a tiny bit higher than its Vendor value, you might be better off just vendoring the said item (this will allow you to avoid the risk of losing an Auction fee if your Item doesn't sell).
Learn only the Essential Skills - Learning new and upgraded Skills gets very expensive very quickly (Buying a single skill that requires level 30 will cost you 1 Gold, and a single level 40 Skill costs 2 Gold) If you buy just the essentials, you can save anywhere from 15 to 30 gold before level 40, depending on your Class. Generally, higher ranks of skills that are used for their utility effects can be skipped (these include Warrior's Harmstring, Rogue's Gouge and Kick, Mage's Frost Nova, and many other CC and utility skills and abilities). Also, don't buy any ranks of abilities that you will not use during leveling (things like Rogue's Expose Armor, Hunter's Eyes of the Beast, Warlock's Eye of Kilrogg, and so on).
This is the lamest excuse to try and pin it on a cash grab. Tbh this is just you complaining to complain, there is no issue. If you wanted to play classic on launch you'd have to sub before hand anyways you're still paying month to month you don't pay by week. The only way you'd lose that money is if you quit before your sub ran out later on down the road.