With orders of $25 or more, Amazon offers the Hammermill 8.5" x 11" Copy Paper 750-Sheet Ream, model no. 150300, for $7.36. Clip the $5 off coupon to cut the price to $2.36. Plus, Prime members receive free shipping. (Non-members can spend $35 to qualify for free shipping.) That's $13 off list and the lowest total price we could find. This 20-lb. paper features a 92 brightness.
Note: This item is part of Amazon's "add-on" program and can only be purchased with orders of $25 or more.