Deainthebox via eBay offers this Women's Push-Up Bandage Bikini Set
in Sky Blue, Orange, or Pink from $5.35
with free shipping
. (Select size/color combinations are about a buck more.) That's the lowest total price we could find by $2, outside of other eBay sellers. It's available in sizes S to L.
Note: This item ships from Hong Kong and should arrive in three to eight weeks.