This is a good idea and there are certainly people who don't have a local coop or such to donate to. However, it is a lot easier for me to drop things off at our coop which has received a lot of my stuff including 4 good bicycles when we downsized to a condo. I have space for only 3 bikes now which has made me much more selective regarding projects. Getting rid of stuff is very liberating and giving it away is even better.