REI Garage offers the White Sierra Men's Altos Work Pants in Dark Sage or Caviar for $18.73. Opt for in-store pickup to avoid the $5.99 shipping charge. That's tied with last month's mention and the lowest price we could find by $11. They're available in sizes 32x32" to 40x32", although not in all size/color combinations.
Of note, members can take an extra 20% off via coupon code "MEMLOVE20". Coupon expires April 10.