I searched for some that were similar and found none. Anyway, this should help anyone questing or grinding near an NPC or area looking to pick up some extra cash. By the way, if you see any limited items of 2 or more.. buy them all and sell them 1 at a time on AH, you want people thinking it's a rare buy. (keeps price up)
Elixir of Shadow Power
Maria Lumere - Stormwind City 90 Silver Limited Suply
Elixir of Demonslaying
Nina Lightbrew - Blasted Lands 90 Silver Limited Supply
Rartar - Swamp of Sorrows 90 Silver Limited Supply
Elixir of Superior Defense
Kor'geld - Orgrimmar 1 Gold 30 Silver Limited Supply
Kor'geld - Stranglethorn Vale 1 Gold 30 Silver Limited Supply
Soolie Berryfizz - Ironforge 1 Gold 30 Silver Limited Supply
Vosur Brakthel - Ironforge 1 Gold 30 Silver Limited Supply
Fire Protection Potion
Apprentice Honeywell - Hillsbrad Foothills 13 Silver 50 Copper Limited Supply
Jeeda - Stonetalon Mountains 15 Silver Limited Supply
Nandar Branson - Hillsbrad Foothills 15 Silver Limited Supply
Frost Oil
Bro'kin - Alterac Mountains 25 Silver Limited Supply
Bro'kin - Hillsbrad Foothills 25 Silver Limited Supply
Frost Protection Potion
Drovnar Strongbrew - Arathi Highlands 20 Silver Limited Supply
Glyx Brewright - Stranglethorn Vale 20 Silver Limited Supply
Hammon Karwn - Arathi Highlands 18 Silver Limited Supply
Skuerto - Arathi Highlands 20 Silver Limited Supply
Great Rage Potion
Hagrus - Orgrimmar 20 Silver Limited Supply
Ulthir - Darkshore 20 Silver Limited Supply
Ulthir - Dustwallow Marsh 20 Silver Limited Supply
Major Healing Potion
Argent Quartermaster Hasana - Tirisfal Glades 36 Silver Limited Supply
Argent Quartermaster Lightspark - Alterac Mountains 36 Silver Limited Supply
Argent Quartermaster Lightspark - Western Plaguelands 36 Silver Limited Supply
Quartermaster Miranda Breechlock - Eastern Plaguelands 36 Silver Limited Supply
Evie Whirlbrew - Winterspring 1 Gold 50 Silver Limited Supply
Evie Whirlbrew - Badlands 1 Gold 50 Silver Limited Supply
Major Mana Potion
Argent Quartermaster Hasana - Tirisfal Glades 36 Silver Limited Supply
Argent Quartermaster Lightspark - Alterac Mountains 36 Silver Limited Supply
Quartermaster Miranda Breechlock - Eastern Plaguelands 36 Silver Limited Supply
Nature Protection Potion
Alchemist Pestlezugg - Hillsbrad Foothills 20 Silver Limited Supply
Alchemist Pestlezugg - Tanaris 20 Silver Limited Supply
Alchemist Pestlezugg - Swamp of Sorrows 20 Silver Limited Supply
Alchemist Pestlezugg - Tanaris 20 Silver Limited Supply
Bronk - Feralas 20 Silver Limited Supply
Bronk - Stonetalon Mountains 20 Silver Limited Supply
Glyx Brewright - Stranglethorn Vale 20 Silver Limited Supply
Logannas - Feralas 20 Silver Limited Supply
Shadow Oil
Bliztik - Duskwood 15 Silver Limited Supply
Montarr - Thousand Needles 13 Silver 50 Copper Limited Supply
Montarr - Blasted Lands 15 Silver Limited Supply
Superior Healing Potion
Bronk - Stonetalon Mountains 10 Silver Limited Supply
Bronk - Feralas 9 Silver Limited Supply
Evie Whirlbrew - Winterspring 10 Silver Limited Supply
Evie Whirlbrew - Badlands 10 Silver Limited Supply
Logannas - Feralas 10 Silver Limited Supply
Logannas - Stonetalon Mountains 9 Silver Limited Supply
Nina Lightbrew - Blasted Lands 9 Silver Limited Supply
Rartar - Swamp of Sorrows 10 Silver Limited Supply
Ruw - Feralas 9 Silver Limited Supply
Thultazor - Swamp of Sorrows 9 Silver Limited Supply
Superior Mana Potion
Ulthir - Darkshore 1 Gold 20 Silver Limited Supply
Ulthir - Dustwallow Marsh 1 Gold 20 Silver Limited Supply
Transmute Mithril To TrueSilver
Alchemist Pestlezugg - Tanaris 80 Silver Limited Supply
Alchemist Pestlezugg - Hillsbrad Foothills 80 Silver Limited Supply
Alchemist Pestlezugg - Swamp of Sorrows 80 Silver Limited Supply
Free Action Potion
Kor'geld - Orgrimmar 18 Silver Limited Supply
Kor'geld - Stranglethorn Vale 18 Silver Limited Supply
Soolie Berryfizz - Ironforge 18 Silver Limited Supply
Tally Berryfizz - Ironforge 16 Silver 20 Copper Limited Supply
Ulthir - Dustwallow Marsh 18 Silver Limited Supply
Vosur Brakthel - Ironforge 18 Silver Limited Supply
If you read all of it, I congratulate you and invite you to +Rep yourself.
Happy New Years!