Don't know how long this "sale" on Amazon will last, but we bit, and ordered this beautiful mattress. It arrived today, and unfolded easily on our bed platform. I put the old piece of foam (not the old mattress "pad") underneath to protect the mattress from the OSB platform. It is great, comfortable, but be warned, it is TALL! I'll have to be careful getting out of bed in the morning.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1