My wife learned that youth shelters/foster parenting agencies need suitcases to help the children move their clothing and stuff around. The usual alternative children get: garbage bags.
We collected up suitcases off the curb that in theory need minor mending (no smells, certain problems left behind), and over time the backlog has built up. Time is also an ingredient, here; in the best case it takes fifteen minutes to prep a curb suitcase, in the worst (cleaning stains, etc.) the suitcase might need to sit around in a ventilated area for days over the course of treatment.