Charity sounds a good idea. I have always either left stuff on the pavement or if larger and in good enough condition that I could ask some £ for, I have used gumtree very effectively - selling an old wardrobe that wouldn't fit up the stairs when I moved in, giving away the shed if they would dismantle that weekend (4 offers in 3 hours), motorcycle top box and an old but reliable sewing machine that went to someone two streets down.
Hope one of these works.