One man's junk is another man's treasure! Printers are usually good for stepper motors and gears. If you don't have a specific shopping list (like I am looking for things that I can use to build a robotic arm, or I am looking for a base for a mobile robot that is big enough to carry a human, etc.), you may find that you will get frustrated because you don't really know what you are looking for... that said, you may find inspiration in some item that gives you an idea for a project!
