I know quite all are aware about you can disenchant Halaa thrown weapons for hudge profit. I'm sure not all know that you can do it with a low lvl alt.
This is my guide on how to do it (I'm actually doing it so this works and is working as intended so shouldn't be fixed).
On every server Halaa is totally dominated by a faction (horde on my server, alliance just keep halaa 3-4 days/month) so you may have 3 cases:
1) You are on a PvP server in the right faction > Just roll an alt.
2) You are on a PvE server > Just roll an alt on the right faction.
3) You are on a PvP server in the wrong faction (shit!)> Roll an alt on another account and trade essences on neutral auction house OR roll an alt on another server and ask in general infos about the faction dominating Halaa. If you are in the wrong one just delete that char and create another one in the right faction.
Let's go to the core:
1) Create an alt char as stated above, choose a class you think you can level fast or you feel very comfortable with (it's a priest for me just because I want to twink him at 49).
2) Choose as soon as possible a gathering profession that gives high encome at low levels (it's mining for me, but I think skinning is good aswell)
3) Learn enchanting.
4) Play your alt normally until lvl 35 (I strongly suggest you an ingame guide you can find on this forum, to reach 35 in nearly no time). Disenchant all the drops you get and mine and sell all that you can.
5) Buy a portal to Shattrath make Scryers your home (It's far more comfortable)
6) Get your mount at 30
7) You should have atleast 150+ enchanting upon touching level 35
Powerlevel it to 275 (only the last 25 points are a bit harder)
Code:
This is a condensed version of Ithilian's Enchanting guide from Blizzardguides.
1 - 2 Runed Copper Rod (1 x Copper Rod, 1 x Strange Dust, 1 x Lesser Magic Essence) x 1
2 - 75 Enchant Bracer - Minor Health (1 x Strange Dust) x 74
75 - 85 Enchant Bracer - Minor Deflection (1 x Lesser Magic Essence, 1 x Strange Dust) x 10
85 - 100 Enchant Bracer - Minor Stamina (3 x Strange Dust) x 15
100 - 101 Runed Silver Rod (1 x Silver Rod, 6 x Strange Dust, 3 x Greater Magic Essence, 1 x Shadowgem) x 1
101 - 105 Enchant Bracer - Minor Stamina (3 x Strange Dust) x 5
105 - 120 Enchant Bracer - Minor Agility (2 x Strange Dust, 1 x Greater Magic Essence) x 15
120 - 130 Enchant Shield - Minor Stamina (1 x Lesser Astral Essence, 2 x Strange Dust) x 10
130 - 150 Enchant Bracer - Lesser Stamina (2 x Soul Dust) x 25
150 - 151 Runed Golden Rod (1 x Golden rod, 1 x Iridescent Pearl, 2 x Greater Astral Essence, 2 x Soul Dust) x 1
151 - 160 Enchant Bracer - Lesser Stamina (2 x Soul Dust) x 9
160 - 165 Enchant Shield - Lesser Stamina (1 x Lesser Mystic Essence, 1 x Soul Dust) x 5
165 - 180 Enchant Bracer - Spirit (1 x Lesser Mystic Essence) x 15
180 - 200 Enchant Bracer - Strength (1 x Vision Dust) x 20
200 - 201 Runed Truesilver Rod (1 x Truesilver Rod, 1 x Black Pearl, 2 x Greater Mystic Essence, 2 x Vision Dust) x 1
201 - 205 Enchant Bracer - Strength (1 x Vision Dust) x 4
205 - 225 Enchant Cloak - Greater Defense (3 x Vision Dust) x 20
225 - 235 Enchant Gloves - Agility (1 x Lesser Nether Essence, 1 x Vision Dust) x 10
235 - 245 Enchant Chest - Superior Health (6 x Vision Dust) x 10
245 - 265 Enchant Bracer - Greater Strength (2 x Dream Dust, 1 x Greater Nether Essence) x 20
265 - 275 Enchant Shield - Greater Stamina (10 x Dream Dust) x 10
9) Upon touching 275 enchanting earth to Shattrath
10) Open Shattrath flightpath.
11) Summon your steed and take the path shown in the map. You will aggro few mobs, but if you just keep going they won't touch you at all. The path shown is for horde alts just because I'm horde and Allince is rarely dominant in PvP
. Just go on to Telaar if you are ally.

12) Upon reaching Garadar or Telaar open flightpath. The npc will be unfriendly to you... no problem with this.
13) Summon your steed again and head to Halaa. The blade vendor
Coreiel for horde or Aldraan for Allies is just right of the bridge you walk by as horde.
14) Just log your char every half hour and buy the blades The sharp cookie or Avenging blades to disenchant them.
15) Note that in both Garadar and Telaar you have a mailbox to send essences to a bank char.