If the link doesn’t take you there, use these terms to find it on their website: Staples 9″ x 12″ Flat Poly Bag, 2.0 Mil, 500/Case
Right now the Staples 9″ x 12″ Flat Poly Bag, 2.0 Mil, 500/Case is on clearance or $7.56 (Reg. Price $17.99) on Staples.com. This is not available in stores so you will need to purchase 2 for $15.12 and get free shipping to your home using Staples Rewards (free to join). You can go here for this deal!
They have others: