I just read about TeacherspayTeachers credits at Mrs. Stanford's Class and I wish I had known about them sooner! Basically, every time you purchase something from TpT and leave feedback for the seller you earn credits that add up to some yummy savings for future purchases! Check out her video here: TpT Credits for more information!
Also, tomorrow starts the HUGE sale so make sure to head over to TeachersPayTeachers and check out the plethora of savings on lesson plans, activities, and other teaching materials.
Hope this helps,