Short post today. Just wanted to mention a couple of vendor items I have been buying and then flipping on the Auction House since Cataclysm's release.
1 Jeweler's Setting- This can be bought from any Jewelcrafting Supplies NPC for 1g 50s each. They are needed in making two of the main pieces while leveling to 525. I have been able to sell these for 15g per through the Auction House.
2. Vanishing Powder- This can be bought from any Inscription Supplies NPC for 34s for five of them. They are used in changing out your glyphs before level 81. I am able to sell these for 1g and 50s per powder.
3. Dust of Disappearance- This also is bought from any Inscription Supplies NPC for 10g 50s each. They are the level 81 and up version of the Vanishing Powder. I list these for 14g per.
These are just a few vendor items you can try out. What other vendor items have you been selling?