Full Mattress donation?

Hello,

My bf and I live together and changed one bedroom to an office space so we’re getting rid of my mattress we don’t use. It’s good condition, clean and soft/firm, like a medium. We deep cleaned it (stain we couldn’t get out is from Diet Coke back in college).

I keep trying to find a place with pick up for donation but they’re all either not taking large donations at the time or rejected it. I’m not comfortable giving to the Salvation Army either. Anybody know where I could donate, or does anyone here know someone that needs a full size mattress?