King mattress (Castleheights/Overbrook)

I have just bought a new mattress, and need to get rid of my king mattress. It has been in a protective cover for most of the time I’ve owned it. It is a Zinus 14”. It’s about 5 years old, but well loved. It still has life left in it. It needs to be picked up by Thursday evening or it’s going out for garbage day, unfortunately.