Found this bag laying on a clearance rack and scanned it with my walmart app and it came up $4. See lots of stock around for as low as $3. YMMV.
Blue: https://brickseek.com/walmart-inv…=58216222
Black: https://brickseek.com/walmart-inv…=89088216
Gray: https://brickseek.com/walmart-inv…=88744650
Walmart link for reference: https://www.walmart.com/ip/SwissT…/582162227