Jockey via eBay offers its Jockey Women's Skimmies Slipshort 2-Pack in White for $14.99 with free shipping. That's the lowest price we could find by a buck, although most vendors charge over $20. They're available in sizes M to XL.
REI Garage offers the Mountain Hardwear Men's My Favorite Beanie in Phoenix Blue or Amphibian for $11.73. Choose in-store pickup to avoid the $5.99 shipping fee. That's the lowest price we could find by $6. It's available in size S/M.
Jockey via eBay offers Jockey Women's No Show Socks 8-Pack in Black or White for $8.99 with free shipping. That's tied with our March mention at $21 off list and the lowest price we could find. They fit shoe sizes 6 to 9.