Groupon offers the AC Pacific 6" Aloe Vera Twin Memory Foam Mattress for $124.99 with free shipping. That's tied with our Black Friday week mention and the lowest total price we could find by $15. It's made with 1" of 3-lb. memory foam and 5" of foam support.
It's also available in full or queen sizes for $189.99 with free shipping. They are also tied with our mentions from Black Friday week and price lows of $5 and $14, respectively.