This deal has ended.
The W Hotel Store takes 30% off via coupon code X9T8S through 12/17. This can be used on The W Bed, the plush-top mattress made exclusively for W Hotels by Simmons. Queen-size is $1099 but just $769 after the code (king is $1299 or $909 after the code). This is not their all-time low (they've had 40% off before) but it's very competitive. Plus, delivery is free. The W Store also sells other bedding and home accessories, as well as apparel. Of note: I ordered this myself over a year ago; the bed is great and delivery is quick.