Walmart has the Spa Sensations 8" Memory Foam Mattress in various sizes, model no. SPA-800T, on sale as listed below. Shipping adds $24.97, or choose free Site-to-Store. That's tied with our mention from two days ago and the lowest total price we've seen for these mattresses. Sales tax is added where applicable. It features a knit cover, three layers of foam, and more. The deals: Of note, Walmart also offers the Spa Sensations 6" Memory Foam Mattress from $115 to $169, and the Spa Sensations 12" Memory Foam Mattress from $279 to $419, each with $24.97 for shipping. (Free Site-to-Store is also available.)