Walmart cuts up to 60% off select clearance swimwear, with prices starting from $3. Opt for Site-to-Store pickup (where available) to avoid the $4.97 shipping charge. Note that sizes are limited. A couple best bets:
Target offers the Cherokee Women's Short Sleeve Side Shirred V-Neck Tee in eight colors for $6. Opt for site-to-store pickup to dodge the $4.99 shipping fee. That's $6 off list and the lowest price we could find. It's available in size XS to XXL, although not in all size/color combinations.