Thought I would share this guide... it has helped me make a bit of gold
Profession leveling kit is basically a bundle of items that you're going to sell. This bundle is large enough to take anyone from 1 to 600 in any but gathering professions. To create a bundle, you'll have to either harvest materials with a gathering profession, or if they're not too expensive, buy them from the auction house instead. If you gather them yourself, there's a lot more gold to be made as there will be no costs for you, except the small mail fees.
To make it easy for you to create these kits, I will include the full list of items one needs to get 600 skill points in any crafting profession. There will even be some excess items remaining so people will be more thankful and not sue you because the kit didn't contain enough items.
1-600 ALCHEMY LEVELING KIT CONTAINS
65 x Peacebloom
65 x Silverleaf
98 x Briarthorn
25 x Mageroyal
37 x Bruiseweed
49 x Stranglekelp
27 x Liferoot
39 x Kingsblood
39 x Goldthorn
15 x Wild Steelbloom
29 x Sungrass
49 x Khadgar's Whisker
15 x Blindweed
46 x Gromsblood
35 x Sorrowmoss
19 x Dreamfoil
48 x Golden Sansam
24 x Mountain Silversage
58 x Felweed
17 x Terocone
40 x Dreaming Glory
17 x Netherbloom
25 x Talandra's Rose
7 x Pygmy Suckerfish
79 x Goldclover
35 x Tiger Lily
28 x Adder's Tongue
25 x Icethorn
45 x Lichbloom
66 x Cinderbloom
18 x Stormvine
19 x Azshara's Veil
31 x Heartblossom
8 x Volatile Life
9 x Twilight Jasmine
110 x Green Tea Leaf
65 x Silkweed
67 x Snow Lily
31 x Fool's Cap
Once you've obtained all of the listed items, it's time to make a macro that will attract buyers. Some people go even further and advertise their profession leveling kits in the official realm forums. For me, trade chat with a sneaky macro has always been enough.
Alchemy needs lots of flowers
To make more gold with this gold guide,
it's recommended that you have
herbalism profession at hand.
Pricing will be harder though, as every realm has different prices for each of the items contained in the profession kit. It's recommended that you count how much the items cost if you sold them in the auction house, and add an extra 25-75% to the price. Personally I usually sell each of my kits for 8-20k, which gives me 3-12k profit most of the time, as I buy all the items from the auction house.
Here's an example macro:
/2 WTS {skull} <name>'s Profession Leveling Kits! {skull} No more running between trainers and AH! Level up {star} Alchemy {star} from 1 to 600 in minutes with this leveling kit that contains all the required items + more! /w me
As for delivery, the kit is a bit bigger than any would imagine. It's best to deliver it via mail, starting from the high end items and progressing down to the starter items so the buyer will see the low level items first and can then snatch them easily without filling their bags with items they don't yet need.
Usually only rich people resort to this service, and if all goes well and the buyer is happy with your service, they usually ask for an another kit for some other profession, or even ask you to send kits to their alts.
EDIT: Props to Kuja for writing the guide, since people decide to flame me, never claimed I wrote it I just thought it was a good guide so I shared