Myself, I still buy bikes I really don't want if the price is right. Typically I will donate them to the co op. Picked up an Ironman yesterday that will likely go that route. Cosmetically challenged, missing most of the original parts, way too big. Will make a good bike for the co op.
The one thing I will never do is keep them around. They either have to be donated or a quick sale (at an attractive price).