We have purchased this mattress and bed from a highly reputable high end retailer, whereby you would pay £299 for them
They are ex display so might have signs of wear and tear as expected
"With a total of 1000 pocket springs in the king size model, our Essentials Collection Pocket Luxury mattresses are a brilliant-value option for everyday use. Thanks to a combination of pocket springs, polyester fillings and the addition of a deep layer of polyester, it offers just the right level of softness and comfort. It's covered with a flat micro-quilted soft stretch knit fabric and the border is finished with vertical quilting. There's no need to turn this mattress, but rotate it regularly to prolong comfort."