Whenever you are out looking for a Discount Mattress, just keep two things in mind. One, that you have serious budget constraints which cannot be altered, and two, that the mattress you need might fit into your theme only if you are open to the concept of used mattresses. People often get put off by the concept of used mattresses and prefer to go in for a new one instead.
If this is the case then go in for a Discount Mattress which compliments the size of your wallet. If your paying capacity is large, you might end up getting the mattress of your choice, but if you have certain restrictions, learn to compromise for the better.