Hi LJGMDAD,
The first link in post #2 has a great search engine for finding local places to donate, dispose or recycle a mattress and many of them are free if you can deliver it.
There is more about organic certifications in post #2 here. The other manufacturer that makes some organic mattresses is Naturepedic. I tend to agree with you that the organic market is somewhat of a niche market and many if not most people who are looking for organic are really looking for “safe”. Much of the organic marketing in the industry is also somewhat misleading and there are many organic claims for mattresses that at best only “contain some organic components” but for those where organic is important for personal, environmental, or social reasons and who want to buy a mattress that fits a more organic lifestyle then at least it’s nice to know that there are some “completely organic” mattresses available. For example you can see a similar organic mattress to the one you have made by OMI (Organicpedic) here.
Phoenix