Hi dmartin,
The price was a closeout price which may have been significantly less than usual for the PLB WBB (and less than they would be allowed to advertise because PLB has MAP or “minimum advertised pricing”) but if you are considering a PLB mattress then it would be worthwhile talking to some of the retailers in post #32 here who all ship PLB mattresses across the country and would be a worthwhile “value comparison”.
Phoenix