Serta Perfect Sleeper Harcourt King Super Pillow Top Mattress – Link 
This has currently dropped to a record low on Amazon to only $347.57 w/ free scheduled delivery! This typically sells for about $700!
- Cool Twist Gel Memory Foam; an exclusive liquid gel-enhanced memory foam designed to help move heat away from your body, helping to promote a balanced sleep temperature
- Continuous Support Innerspring system, combining our continuous coil design with our Head-to-Toe Coil Construction
- The Serta Perfect Sleeper is the Only Official Mattress of the National Sleep Foundation (NSF), designed with input from the NSF to help address 5 common sleep problems.
- 10-year limited warranty
- Mattress Only, Boxspring is purchased separately
Remember: Amazon’s prices can change on a dime. The price quoted above is true of this posting. Confirm price before you check-out.