0 - 150 profession trainer
150 - 225 buy book AH ~1.5g
(or that keep in arathi a guy sells)
225 - 300 theramore isle see the doctor in the castle
this entails doing a quest with the doctor involving HIS bandages and some sick soldiers.
300 - 375 buy the book on AH
(I don't know where to buy the 300+ book but someone might post that info)

If you're not working on an orange con or yellow con bandage go see your trainer to see if they have a new one. If that doesn't pan out search AH term: 'bandage' to find scrolls.

Over 300 - you need to see the dranei dude just outside the Temple in Hellfire Pennisula - down path to the right - sells books for higher healing one cost 1G, the other 4G.  Good luck

because of the fact that if you're doing a run and your healer doesn't have any mana, bandages come in handy

See Dr. Gustof van Howzer in Foothold Citadel in Theramore in Dustwallow Marsh - gives you quest called Triage - you have to save as many wounded soldiers as possible - get manual for runecloth - normal and heavy.  Then its off to Burko (22,39) in the Temple of Tellemat in Hellfire Pennisula who will sell you 3 items - Master 1st Aid book and heavy and normal netherweave bandages.  That's as far as it goes, as far as I know of - good luck

maybe because not everyone can heal? i honestly didn't bother getting bandages on my priest, since its a healer, but...

its just a lil useful on my rogue ;P its also much faster than eating...

because healers can't fight and even if you have one there is still four guys that have to be healed so why not just heal your self and have 5 guys fighting instead of just 4

Wow.....the lack of intelligence is almost painful....

Note: Temple of Telhamat in Hellfire is alliance only! Falcon watch (which is just south of this Temple) is Horde.

Also, the 'Draenei dude' is Burko and he's not outside of the temple but within the area. If you go up the flights of stairs, he's to the left before the last flight.

i started in the first place to make more money, i mean, when you get to silk the bandages start to sell for more. but then i realized it was actually pretty useful for a hunter (mend pet + gift of the naaru for draenei + first aid = nicely healed pet)

The first aid manuals for lvl 300 and beyond are bought from Burko the Medic, Temple of Telhamat, Hellfire Peninsular.22:39

Since no one on any web site wants to give coords for Dr. Gustaf VanHowzen, I will. He was a real PITA to find. He is in the Foothold Citadel coords 67.8, 49.0, dustwallow marsh, Theramore isle.

Thank you soo much, your the best! Just the info I'm looking for.