Stores like Sears and MattressFirm are good places to buy mattresses. There are also stores that deal with mattress wholesalers, like Sleep Number, that are good retailers for buying a mattress.
Sears has a listing for mattresses that allows for shoppers to search for different kinds of mattresses. These mattresses can be searched for by manufacturer as well as size and price. Sears also allows for users to filter by user rating. MattrressFirm offers different search options as well as a form that allows users to apply for credit or get a 90-day payment option if they cannot afford to pay for their mattress up front.