Walmart offers the Zinus Slumber 1 Comfort 6" Twin Mattress for $58 with free shipping. That's $6 under our per-mattress price from three weeks ago and the lowest price we could find now by $8. It's also available in a Full size for $74 with free shipping. That's the lowest price we could find by around $6.
Knowing what to expect in advance can help you prepare for -- and adjust to -- life in your golden years.