During Black Friday, you can get $100 off the Serta Perfect Sleeper, as well as a free bedding bundle, which includes two pillows, a sheet set, and a mattress protector. You can upgrade to a White Glove delivery to have the mattress set up for you, as well as the removal of your old mattress and foundation.

A lesser-known benefit of buying a past-season mattress, especially one that's been on the market for years, is its proven track record. If you're unwilling to take a chance on a new bed that's relatively untested — even with a mattress trial in place — a discontinued mattress often has a trove of reviews you can explore for greater peace of mind.

Amazon's Cyber Monday sales are about to expire. But you can still start saving on your holiday shopping and pick up a little something for yourself, too, from TVs and tablets to laptops and so much more.