Overstock drops the Serta 2-inch Memory Foam Topper with Contour Pillows from $93.99 to $84.59 through 7/23 for the lowest price we've seen to date by $5. Plus, shipping is just $1. This set, which retails for $139.99, includes a 2-inch high density memory foam mattress topper and two contour pillows. It comes in twin, full, queen, king, and California king for this same price. It is well reviewed with 4.6 out of 5 stars from over 1,400 buyers. There's no sales tax (except UT).