Sweetnight Home via Amazon offers its Sweetnight 10" Gel Memory Foam Mattress, with prices starting at $318. Coupon code "LJHPNOGY" cuts the starting price to $238.50. Plus, these items receive free shipping. That's $32 under the starting price of last week's mention, up to $142 off, and the lowest price we've seen in each size. Deal ends February 23. The deals: