I would love to say, I will take them, finish them and donate them, but I also need to clear the clutter. I understand the concept of dump what no longer brings you joy. I would suggest, methodically looking over these unfinished pieces and chose a limited number to take on to finish. Do this with the mindset of, "I started this, invested in this quilt and I need to discipline myself to finish it." The other quilts could be offered to a local quilt guild who may have members who would finish them and donate them to an organization that is local.
For my self, I would bundle them in small groups and finish them all over time. One UFO then one new project, UFO, new and so on. If you are a guild member throw a party and ask volunteers to come help and then donate to a local shelter, hospital, hospice and so on. Just more ideas!