If you are buying from brands like SleepyCat, Wakefit, or The Sleep Company, keep an eye on:

Many brands offer "Spring Cleaning" discounts around March. 2. E-commerce Giant Events

Always check the trial period . Most modern mattress-in-a-box brands offer a 100-night trial. Even if the price is great, it’s only a "good deal" if you actually sleep well on it.