This deal has ended.
The W Hotel Store takes 35% off via coupon code Q9X3K through 5/4. This can be used on The W Bed, the plush-top mattress made exclusively for W Hotels by Simmons. Queen-size is $1299 but just $844 after the code (king is $1499 or $974 after the code). This is not their all-time low (they've had 40% off before) but it's the best deal this year. Plus, delivery is free. The W Store also sells other bedding and home accessories, as well as apparel. Of note: I ordered this myself during a previous deal; the bed is great and delivery is quick.