This deal has ended.
A Visco 8" Memory-Foam Mattress, originally $1100, is $399 via Groupon for twin-, full-, and queen-size mattresses. A king-size is $499 (a $1201 drop from list). On top of that, shipping is free! This mattress includes a washable velour cover to block allergens and it comes with a 20-year warranty. There is a limit of 2 per person.