Amazon offers its AmazonBasics Multipurpose Copy Paper 500-Sheet Ream
in 92 Bright for $3.27
with free shipping
when you order via Subscribe & Save. That's tied with last week's mention, $5 off, and a great deal for a single ream of paper shipped. It's acid-free and works with both laser and inkjet printers.
Be sure to cancel your subscription once your order ships to avoid being billed for further shipments.