A 20lb. case of 5000, 8 1/2" x 11" HammerMill Copy Plus Copy Paper drops from $50.99 to $24.99 at Staples.com. Even better, the shipping is free and rewards members can get 5% back, which can be used on future purchases. This is the best price we could find for ten, 500-sheet reams of this paper by $43. These standard sized sheets are moisture and curl resistant to prevent jams and work and well in both laser and inkjet printers. Sales tax is charged in most states.