Bedshe via Amazon takes 50% off the Diamond-Pattern Duvet Cover Set in various sizes and colors via coupon code " AMMFSLD4"
Shipping: Prime members receive free shipping on all sizes. (Orders over $25 before coupon net free shipping for everyone.)
Sizes with prices after coupon:
Twin https://www.amazon.com/dp/B072PQWJZ8 for $9.99
Queen https://www.amazon.com/dp/B071Y2X7N for $13.49
King https://www.amazon.com/dp/B071LLXRCL for $14.99