I'm part of a community of Zibbet sellers that are selling items for only $1 with free shipping. If you are not a Zibbet Seller: PIF or "pay it forward" is a random act of kindness where the recipient instead of doing a good deed to the person who "deeded" them, passes the kind gesture onto someone else. I currently have several PIFs in my shop. You should check them out and feel free to buy them!
PIFs on A Crafty Arab's Zibbet shop.