Buy one Nicole by OPI Nail Polish at its Tanga price of $8.99 (valued at $19.99) and get one free with coupon code FREEOPI at checkout, making each each polish $4.50. Better yet, shipping is free. Colors like this pictured purple Give Me a Spring Break hue can be paired with Mango Maven to get the discount. The best shipped price we could find on either of these items individually was $4.95 plus $2 shipping. There are five colors to choose from. Sales tax is not charged in most states.