Apple MacBook is one of the finest brands you can find on notebooks' market right now, but not everyone can afford an expensive MacBook. For those who can't afford them, can buy some on second-hand, and there are also websites which are specialized on selling cheap MacBooks.
One of them is MacBook Mart which sells a lot of cheap MacBooks. If you're looking for a budget black or white Mac Book, a MacBook Air or the cheapest MacBook Pro 15" or 17" or the new Aluminum MacBooks, then  they can help. Their custom search engine integrates eBay to find you the best deals.
If you are not satisfied with them I made a rough research on the Internet to present some of the best choices for very cheap apple MacBooks under 1200$.

Apple 13.3 Macbook Intel Core 2 DUO 2.4GHZ, 2GB RAM, 250GB Hard Drive, nVIDIA.. 2.0 GHz - 2.0 GB RAM - 250 GB Hard Drive - 13.3" Display - Mac OS X. Â Â Intel Core 2 Duo 2.4GHz, 2GB DDR3, 250GB SATA, NVIDIA GeForce 9400M, 13.3" Display, Aluminum unibody, SuperDrive, Gigabit Ethernet, AirPort Extreme Wi-Fi, Bluetooth, iSight camera, OS X 10.5 Leopard.The price you can find it is around $1000.
Apple 13.3 Macbook Intel Core 2 DUO 2.0GHZ, 2GB, 250GB, Superdrive - Aluminum. Intel Core 2 Duo 2.0GHz, 2GB DDR3, 250GB SATA/100, 256MB DDR3 Nvidia GeForce 9400M, 13" Display 1280x800, Super Gigabite Ethernet, 802.11n WLAN, Bluetooth, OS X 10.5 Leopard . Price at $1,189.99 MB4.

The Apple MacBook (MB403LL/A)Â has a sleek, 1.08-inch-thin design MacBook. These characteristics make it easy for the product to hit the road and also thanks to its tough polycarbonate case, built-in wireless technologies, and innovative MagSafe Power Adapter (it releases automatically if someone accidentally trips on the cord), this product is an amazing one.
These are some options for very cheap apple MacBooks you can find on the Internet. These products, although are very cheap MacBooks compared with others, are very well built laptops.

Simon Stewart, on September 19, 2009
Apple are missing a trick here in the present economic climate... re-introduce the basic Macbook in black again and also in other colors..I am sure students as well as other consumers would lap them up!
Simon Stewart.