First off sence the newest patch blizzard changed the old farmers broom into the cool new flyng broom mount model by accident
Thottbot World of Warcraft: Farmer's Broom
sence its the horde only item (AKA horde get it much more easely than allliance) i saw it in alliance getting sold for over 200 gold.
So basicly you need to get to Tirisfal Glades somehow, and grind the tirisfal farmheads Thottbot World of Warcraft: Creature: Tirisfal Farmhand untill you grind a few of those.
Than just go to any major city and sell them with ease.