Here's a list of charities to donate your good quality clutter to. If you have electrical items, plants, packing boxes or anything else you don't need cash for you could offer them to members of Freecycle.
I called Stella in a real state, completely overwhelmed by messy and disorganised flat. Within a few short hours Stella had completely transformed it to an oasis of calm, peace and order. She has a combination of great energy, a logical and ordered mind, creativity and finally a lot of experience - in both bringing order to chaos as well as options for removal of unwanted items. What I had thought was an impossible task was completed extremely quickly with minimal stress.