: Offers numerous metal "Smart Box Spring" foundations for under $100, including the Amazon Basics Smart Box Spring and the Zinus WonderBox (often on sale for ~$72).
: Sites like Freecycle or EstateSales.net are recommended by budget-conscious shoppers for finding box springs at little to no cost, though you should check carefully for hygiene. Cheapest Alternatives cheapest place to buy a box spring
: Sells clearance and "outlet" versions of major brands like Sealy and Beautyrest at significantly reduced prices. : Offers numerous metal "Smart Box Spring" foundations
: Frequently features clearance and reduced-price metal foundations starting around $96–$99 for queen sizes. cheapest place to buy a box spring
: Known for "Way Day" sales with discounts up to 80% on foundations and box springs from brands like Wayfair Sleep and Alwyn Home.