Sears offers the Serta Karlie Plush California King Mattress
in Off White, model no. 030462370, for $593.89. Coupon code "SPRING" cuts it to $534.50
. With free shipping
, that's $59 below our mention from last week and a very low price for such a Serta mattress. (For further comparison, it is $77 under our July mention of a plush standard king.) Sales tax is added where applicable. It features an innerspring system, foam encasement, and more. Deal ends March 31.