Our favorite cheap mattress just got more affordable: Save 17% on the Siena Memory Foam Mattress

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The Queen-sized Siena Memory Foam mattress is under $300 at Amazon.

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A mattress purchase isn't one you should make lightly, but that doesn't mean it has to send you into debt. You might be surprised to find that plenty of the best mattresses offer the same quality at an affordable price as luxury beds that cost hundreds, or even thousands, of dollars more. In fact, one of our favorite affordable options...