This Item Is Temporarily Unavailable El Capitan Reinstall

I'm trying to reinstall OS X (Lion, or higher — which version doesn't matter to me right now) on a Macbook Air, 11-inch, Late 2010 model. The machine came with OS X Lion pre-installed, and has been upgraded up to El Capitan while I used it. I recently decided to give the MBA away. So I thought I'd repeat that process and reformat + reinstall. After I chose the safest format option (the one that takes several hours); I tried to install OSX again (via the internet since I have no disks). Everytime I tried to login with my apple-id it said 'this item is temporarily unavailable'.

I have an older, MacBook Pro (15-inch, Mid 2009) that I intend to give as a gift.

For security reasons, I decided that I was a good to format the drive and reinstall OS X El Capitan.

My first effort was thwarted by an error:

This item is temporarily unavailable.Try again later.

After reading Wiped drive, now can’t reinstall El Capitan from Recovery because the “item is temporarily unavailable”, I supplied a different set of icloud credentials, and the process continued.

Eventually, however, the installation failed with a different message:

No packages were eligible for install. Contact the software manufacturer for assistance. Quit the installed to restart your computer and try again.

I tried using 'Internet Recovery' (Option+Command+R) and a bootable USB drive that contained El Capitan, both of which ultimately failed with the same message.

Capitan

Is there a way to get this to work?

To create a bootable USB drive, I needed the Install OS X El Capitan.app package.

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Using my MBP 16', I used the Download OS X El Capitan link on Apple's support site to get the installer.

Unfortunately, running the InstallMacOSX.pkg package in the DMG failed:

This Item Is Temporarily Unavailable El Capitan Reinstall Windows 10

This version of OS X 10.11 cannot be installed on this computer.

Reinstall Os X El Capitan Error This Item Is Temporarily Unavailable

I 'found' a Install OS X El Capitan.app package and was able to create the bootable media.