Hi tgrafix,
This is a Berkeley Ergonomics mattress and it uses good quality materials and has no weak links in the design. If you can’t test a mattress ahead of time though and you aren’t confident that a mattress is a good match for you in terms of PPP then any exchange or return policies of the store and any costs involved may become a more important part of your personal value equation in case the mattress doesn’t turn out to be a suitable choice for you.
Mattress sales are often rotating and just change from one sale to another depending on the time of year or the closest holiday.
If you let me know your city or zip code I’d be happy to let you know about any of the better options or possibilities I’m aware of in your area.
Phoenix