Amazon offers the Tampax Radiant Plastic Unscented Tampons 16-Pack in Regular Absorbency for $3.97. Clip the $3 off on-page coupon and add it to your cart via Subscribe & Save to make it 77 cents with free shipping. That's tied our January mention and the best price we've seen for this product. It's also $3 under the price you'd pay at a retail store.
Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.