Walmart offers the Maytex No More Mildew Shower Curtain Liner in Clear for $6.50. Opt for in-store pickup to avoid the $5.99 shipping charge. That's tied with our February mention and the lowest price we could find by $9. It measures 72" x 72".
Walmart offers the South Shore Spark Full 54" Bookcase Headboard in Chocolate for $94.84. Choose in-store pickup to cut it to $91.14. (Amazon charges the same.) That's the lowest price we could find by $18, outside of the mention below. It features three open shelves and a hole for cable management.
A close price: Home Depot has it for $93.87 with free shipping.