Gamiss offers this Women's Spaghetti Strap Criss-Cross Lace-Up Bikini Set in Pink for $2.99. Coupon code "MAY25" cuts it to $2.75. With $1.45 for shipping, that's $14 off list and the lowest price we could find. It's available in sizes S to XL.
Note: This item ships from China and may take two to five weeks to arrive. Also, uncheck "Add shipping insurance" at checkout to dodge the $1.06 charge.