$2 Tanks- Old Navy 8/15 This post may contain affiliate links. Please see the full disclosure policy here. Posted on August 13, 2009 Written by Mary Leave a Comment $2 Tank Tops are back at Old Navy!! Head to Old Navy this Saturday, 8/15! Be sure to check what time your local store opens so you can be in line EARLY! If this is anything like the $1 Flip Flop sale, it will be SUPER busy!