Staples: $25 Off HammerMill Copy Paper 10-Ream Case Coupon Posted on March 8, 2013 by Heidi delivered right to your inbox. And for even MORE great money saving deals and tips, follow HotCouponWorld on Facebook and Pinterest too! Take $25 off the purchase of a case of Hammermill 8.5″x11″ CopyPlus copy paper! 10 ream case, limit one case per customer. Use online or in store! Makes a case of paper only $25.43 after coupon! Picture of my cart below!