Why is it so hard to buy parts from people

The small town that I live in has a free marketplace that we throw unused items on there. Right in the sign up agreement it states that the person giving away the item chooses who the item goes to. It may be the first person but usually the person that appears to need it the most. You should hear the people complain that don’t work or want to work but try to grab every free item listed. I swear they monitor it 24 hours a day.