Sure leveling your WoW First Aid is important, but can be costly as hell.  Here is a way you can earn enough gold to level your  First Aid with this  WoW Gold Farming tip that I call:

“WoW First Aid - Don’t Be A Doctor, Be A Salesman”

There are tons of people that at any given moment are leveling their first aid skill, so why not capitalize on it?  The fact is that if you want to max out your first aid skill you will need to buy a books.  Now as usual most people will be to lazy to try and figure out what vendors sell these books and will head straight to the AH.  This is where you can cash in…big time.

You are going to want to acquire 2 books:
Expert First Aid
Master First Aid

The first book Expert First Aid is easy enough to get, and can be purchased from the vendor for 1 gold and can be sold in the AH for nearly 3 gold.  It is sold by two vendors:

Deneb Walker Arathi Highlands 27, 58

Balai Lok’Wein Dustwallow Marsh 36,30

While at these vendors pick up Manual: Heavy Silk Bandage and Manual: Mageweave Bandage

The second book is Master First Aid which is a little more tricky to get at becuase it is sold in Hellfire Peninsula.  The vendors will sell this book for 5 gold and it can be turned around and sold in the AH for nearly 10 gold.

Aresella (Horde) Hellfire Peninsula 26,62

Burko (Alliance) Hellfire Peninsula 22, 39

While at these vendors pick up Manual: Heavy Netherweave Bandage and Manual: Netherweave Bandage

If you pick up a few copies of these book and sell them on the AH then you will be well on your way to leveling up your WoW First Aid very quickly