Modern contemporary form of how to sell something, donate, buy, find, is just a form of advertisement. Perhaps a small child knows it, because free ads are all around us today.
Advertising departments are busy because people still need something and are looking for, they are getting more comfortable and free ads can help them quickly and free. Do you also have a request or you have something to dwell on? Know that your advertising counterpart will be waiting for you at the other end of the city, the Republic or the world.
So what's stopping you?
Sit and write. Or sit down and read. Or sit and choose. The world of supply and demand is great, and you'll find what you need. Free classifieds have always been, are and will be beneficial to people, so let's use them for your good purpose. A happy hand and a good choice!