I would suggest Alchemy. You can get the list here: http://www.wow-professions.com/wowguide ... guide.html
. Also, all the items fit in guild bank tab(I didn't count the vials), which makes it easy to sell.
I thought about doing it this way:
Have the person who you are selling the kit to join the guild (can use an alt)
After the person makes sure everything is there, deposit the money
Raise the ranking so the toon had access to that tab.
To avoid the person being suspicious, you can say in chat that by depositing "x" amount of gold into the bank, the person is purchasing all the contents in tab 1. This way, if you try to scam the person, Blizzard can check the chat logs and recover the money.
AlexS: One more thing, hate to be a downer, but your kit only levels someone to 436. You're missing ALL the mats to make flasks from 435 to 450. One of the downsides to the wow-professions.com guide for Alchemy is that they DON'T list the mats for 435 to 450. Flask of the Frost Wyrm is cheapest on my server, so that's what I offer.