Hi poppyone,
I’m not quite sure what you mean here because price isn’t really a good way to define the value of a mattress. The price of a mattress is only one part of its value and value itself is always relative to what is available to you in the area you live in, your personal criteria and preferences, and the specific mattresses you are comparing or considering and how they compare to each other. In many cases the price of a mattress has very little relationship to its value.
This post I linked earlier has more information about the most important parts of the value of a mattress.
There is more about what I call your “personal value equation” here.
There is also some very general information about the types of mattresses you may find in different budget ranges in this article but this is a very generic guideline only because there are too many variables involved to really use a budget range to define value.
Phoenix