Hi oceanmd,
The price seems very high to me for the materials and components in the mattress although you didn’t mention the size or whether this was a mattress only price. It also appears that you are getting some misinformation.
Qualux is not “HD memory foam” but a “family” of polyfoam made by Carpenter with high resiliency characteristics (low hysteresis or energy loss) and can range from 1.5 lbs to over 3 lbs. Qualux Ultra is an actual HR polyfoam with similarities to latex in terms of performance.
Bonnell coils can be very strong but they are also among the lower cost types of innersprings and it’s important that the design of the mattress and the insulator pad over them is appropriate to even out the generally lower coil count of Bonnel coils (to keep the foam from compressing into the coils).
You can read more about latex allergies in post #2 here. In practical terms … an issue with a latex allergy with a latex mattress would be quite rare.
Overall … it appears to me that you are dealing with someone that doesn’t know a lot about mattress materials and is selling you a “story” … and a very expensive one at that … more than a mattress.
Phoenix