Walmart offers 10 Tivoli II 6x36 Peel 'N' Stick Vinyl Planks in Mahogany or Redwood for $12.98. (Amazon charges the same.) Opt for in-store pickup to dodge the $5.99 shipping fee. That's $2 less than our November mention and the lowest price we could find now by $9. These 2mm-gauge planks work on any dry or flat surface.

Note: They're available in a selection of other colors for slightly more.

Update: Mahogany is now $11.98. Redwood is a buck more.