Walmart has these packs of copy paper on clearance for 75 cents each. I just bought 45 packs in my store for around $36 after taxes.
Brickseek
Walmart
Regular price $3.72 Each
Basically a 10 ream case for $7.50, which is a fantastic price.
Also, the 88 Brightness printer paper is the same price.
Brickseek
Walmart