Overstock has the Bodipedic Essentials 3" Memory Foam Wave Mattress Topper (Queen, King, Cal King) for $80 with free shipping. The twin and full sizes are $75 with free shipping. 3 lb. memory foam with ILD of 8-10.
Bodipedic Essentials 2" Memory Foam Wave Mattress Topper (all sizes) for $60 with free shipping