Hi card,
I would need to know all the information in this article (including the type and thickness and density of any foam in the comfort layers and any foam that is quilted to the cover) to make any meaningful comments about any mattress.
While 1.8 lb polyfoam comfort layers would meet the minimum durability guidelines that I would suggest for your BMI range so it would be a suitable choice if there are no other foam layers or components in the mattress … I would also want to make sure that there are no other missing layers in the mattress description (that could be a weak link in the mattress) by making sure the thickness of all the layers and components adds up to the thickness of the mattress.
In many cases wholesale manufacturers aren’t set up to deal directly with consumers and will only provide this type of information directly to their retailers and it’s really the job of the retailers to provide the information you need to make informed choices anyway so you don’t have to chase down the specs of the mattresses that they sell but you could always try and see.
It would depend on the store and/or the manufacturer. Materials that are certified organic generally cost more than the same materials that don’t have an organic certification because of the cost involved in the organic certification process itself but some stores or manufacturers also use organic certifications as a reason to charge significantly higher prices as well that in some cases are difficult to justify.
Most people that are looking for an “organic” mattress or materials are usually concerned more with “safety” than whether the materials have an actual organic certification and they usually aren’t aware that an organic certification isn’t the same thing as a safety certification. There is more information about the three different levels of organic certifications in post #2 here and some of the benefits of an organic certification in post #3 here and there is more about the different types of organic and safety certifications such as Oeko-tex, Eco-Institut, Greenguard Gold, C2C, and CertiPUR-US in post #2 here and more about some of the differences between organic and safety certifications in post #2 here and there are also some comments in post #42 here that can help you decide whether an organic certification is important to you for environmental, social, or personal reasons or whether a “safety” certification is enough.
It varies between different stores so it’s not really possible to generalize but smaller sleep shops will tend to have less commissioned salespeople than larger retailers or chains.
Phoenix