I bought a $300.00 mattress without a box spring, yes, i admit i had no warranty, HOWEVER…. This new Serta mattress was sagging big time after 2 months. They claim its because of my box spring, but the bed inspector told me and i quote ” your 17 year old box spring is way stronger then any of the new box springs being made today

yours is made of Oak

you can’t buy box springs like this anymore

your box spring is perfect”” The bed inspector also told me NO mattress should be sagging after 2 months

even two years. My mattress at 2. 5 months old was saggging 1.5 inches