After patch 4.0.3 the enchant cloak stealth (Enchant Cloak - Stealth - Spell - World of Warcraft) has changed to +8 agility & +8 dodge rating making it one of the best enchants for twinking.
The materials needed are :
3 Small Prismatic Shards - about 1g -> 2g for all
3 Greater Planar Essences -> 20g - 40g for all
2 Fel Lotus -> 2g - 10g for all
So grad total will cost you 23g - 52g and you will be able to sell it for 250g+. Better hurry up cause I sell them like hot cookies and it seems that in my server no1 else is bothering to supply this scroll.
Note that the recipe requires to have Cenarion Expedition Exalted reputation to buy.