Reinstalling Mac OS X Lion from Recovery problem

Question

So I've decided to sell my 2007 Macbook (Black) to someone else, but when I tried to
wipe it (I already did it successfully) and reinstall Mac OS X Lion, it comes up with
"This item is temporarily unavailable. Please try again later"
It happened today, I'll try again tomorrow since it says "Please try again later"
but I need a quick solution because I need the money! Help please!

Answer 1

If you plan to sell or give away this computer, then you must install the original version of OS X that it came with pre-installed. That was 10.4.9 or 10.5 depending upon which model you have. Get out the installer discs that came with the computer and use them to erase the disk and install a fresh copy of OS X. Or you can do the same using the retail Snow Leopard DVD.
Clean Install of OS X
     1. Boot the computer using the OS X Installer Disc or the Disc 1 that came
         with your computer.  Insert the disc into the optical drive and restart the computer.
         After the chime press and hold down the  "C" key.  Release the key when you see
         a small spinning gear appear below the dark gray Apple logo.
     2. After the installer loads select your language and click on the Continue
         button. When the menu bar appears select Disk Utility from the Utilities menu.
         After DU loads select the hard drive entry from the left side list (mfgr.'s ID and drive
         size.)  Click on the Partition tab in the DU main window.  Set the number of
         partitions to one (1) from the Partitions drop down menu, click on Options button
         and select GUID, click on OK, then set the format type to MacOS Extended
         (Journaled, if supported), then click on the Apply button.
     3. When the formatting has completed quit DU and return to the installer.  Proceed
         with the OS X installation and follow the directions included with the installer.
     4. When the installation has completed your computer will Restart into the Setup
         Assistant. Before it restarts just shut it down.
Be sure you also de-authorize the computer and sign out of your iCloud account.