Repping up with Darkmoon faire quickly and cheaply during Harvest Festival(ongoing)

So It's been a long time since I bothered with Darkmoon faire. Recently I came across a quest that grants you 250 rep for a 36xGreen Firework turn-in though. 

It turns out a Harvest Festival NPC sells you that very item for the quest very cheap. 

Green Fireworks is the Darkmoon repeatable, and the Harvet Festival NPC outside of IF/Ogrimmar sells the fireworks item!!!

Thiss would otherwise would be a bit expensive to buy off the AH during this period.

Note that it stacks up only till 5 so fill up !

Have fun !...