One place where you can advertize things you want to get rid of is http://agora.co.il .

As for CRTs: I got my previous one from the street. The person who ditched it tucked a note to it: “תקין” (works). It’s really considerate of people to tuck a message because it lets you know that it’s a valid giveaway and not a lost property. In the religious parts of the city I live in people tuck “הפקר” (abandoned). I once saw a “הפקר” sign on a garden wall inviting people to take its fruits.