Donation help

I have a new queen mattress that I need to donate and I'm having a hard time finding a charity that will take it. I have tried shepherds gate, Tri-Valley Haven, and a few other places and no luck. I purchased a Tuft & Needle mattress in January, so it has only been used for 2 months. They have a great return policy, which is a full refund after you donate the mattress to a charitable organization (which you can check on their website). There is nothing wrong with the mattress and it has good reviews. I was in need of a new mattress and thought I would try it out and decided a Tempurpedic works best for me. If anyone knows of a charity that could use this and will take it, please let me know at promosjean@gmail.com. It's a $700 mattress. Thx!