After erasing MacHD & MacData: Cannot re-install OS X because there is no Drive to choose (selling laptop)

Hi,

Something must have gone wrong when trying to erase MacHD before selling it.

I followed the instructions from Apple (steps 1-7). After I did CMD-R and went to disk utility to erase the 2 drives (HD & Data), I tried to Recover Mac OS. This is when I got the problem: It asked me to choose the drive from the list below, but there was no disk to choose. So, I shut down the laptop.

I followed another instruction to reset the NVRAM, so I did that. Then I tried again to install OS X but again no disk was available to choose. I shut down again.

Then, I tried to do another CMD-R and got a blank white screen. I shut down.

So, I restarted with Option-Cmd-P-R. I got back into disk utility. This time, I clicked on my Crucial HD and clicked First Aid. It was okay.

THE PROBLEM: Just beneath the crucial hd, was "disk0s2" I clicked on First Aid and Verify Disk - the result was "Verify volume failed: unrecognized file system." The same response was give when I tried to Repair Disk.

Can someone help me install an OS X somehow? There is no browser, so I don't know what to do?

Thank you