Computer desktops can be found everywhere, you can check your house for some, check on craigslist, business closings, school auctions, eBay, and some sites sell used computers in bulk for a low price. Keep in mind when you scrap computers try to get a high volume of each components before selling it on eBay. This will attract more buyers and will definitely get you a higher offer for it. 5 pounds or more for gold bearing components is good and 10 pounds plus is good for the non gold bearing components. You can sell the gold fingers by the pound because they go for a lot.
Also, be sure that everything in the computer doesn't work, because it's better to sell the working components as is, for it will be worth more than selling it as scrap. Inside the computer there are a lot of different types of metal. For example, gold, silver, palladium, copper, aluminum, and all types of wire with copper in them. The computer has many different components also. Click this link for a more in depth explanation of some of them.
- Case - outside of the desktop that protects the components, usually made of steel.
- Motherboard - The main board that holds most of the gold bearing components
- Hard Drive - Has Aluminum, Steel, Palladium, and a High Grade Board. Your computers memory.
- Disk Drive - The DVD and CD player, has a high grade board.
- Power Supply - The big box that has a lot of wires sticking out of it. Has Copper
- CPU - On the motherboard usually under a heatsink. Has gold
- RAM - The data for your CPU that plugs into the motherboard. Has gold
- PCI Boards - Has Gold Connectors that connects to the motherboard. Has Gold
- Heat Sink - Usually made of Aluminum or Copper
- RAM - try taking out the ram first it should be really simple its secured by plastic tabs, loosen them and just pull out the RAM. (Look at Top Left Picture)
- Heatsink - The Heatsink is covering the CPU, it should have fasteners or screws holding it down, take out the screws or apply pressure to the fasteners to pull it out. (Look At Top Right Picture)
- CPU - The CPU should be under the heatsink, to take out the CPU there should be a lever, just pull it and the CPU should pop out. (Look at Top Middle Picture)
- PCI Boards - The PCI Boards should be really simple too, just pull it out, you might need to take out some screws
- Motherboard - Once you've took out the components connected to the motherboard, you should take out, of course, the motherboard next. All you should need to do is take out the screws that connects it to the case and it should pop right out.
- Hard Drive - This is pretty simple to take out, just unscrew it.
- Disk Drive - Just unscrew it too and it should pop out.
- Power Supply - Unscrew and it should come right out.