Hi frankma,
I’m looking forward to finding out what you end up deciding … and of course any comments or questions you may have along the way to finding your “Christmas present” 
You can also see some comments about the type of “fake sales” that often happen on holidays in the guidelines here and in post #5 here. I would treat these types of sales as a red flag because good quality/value mattresses are available every day of the year from better retailers or manufacturers that don’t need “fake sales” to create a false sense of urgency.
Phoenix