One thing for certain, any old cycling gloves with too many holes/splits, etc. are happily thrown away. Gross. Same for tights and overstretched headbands. Forget it.

But I do have an old, washed pannier that just has a slight hole in pocket. Has been handy for guests since they never need to use every inch of it. Just something for any small purchases they make when I lead them around the city during the visit on bike.