What is a right queen size mattress that i can find for lower than 400? ...

If I be to ask if anyone know...
Answers:    No such thing, I enjoy tried you about 2 year and done up buying a Serta Therputic 6000 and it cost me about $1000
Those cheap mattress' single end up giving you a stiff vertebrae, or you hear the springs poping in them contained by about 3 months. So release your money and spend a little more it's all right worth the extra.
I would prefer to hold a house designation...
Firm talalay latex with a wool fleece wad.
http://www.foambymail.com/LatexMQueen.ht...
http://www.cuddledown.com/shopping/produ...