Hi cristano1,
I think that Sleepy1 has provided the same warning as I would. You can read more about their history in post #6 here and the links it contains and a forum search on greenmattressfactory (you can just click this) will bring up more posts about them as well. I have also talked with others in the industry who were affected by their history that isn’t mentioned in any of this and there is more to their story than you will read (as bad as it is).
I would call them “buyer beware”.
There are many great choices to buy a good quality and value mattresses where you wouldn’t have to deal with a questionable business or people including mattresses.net which is a member of this site (which means that I believe they are among the best quality and value in the country).
The list of the better options in the Los Angeles area is in post #2 here and it also includes one of the members here.
Phoenix