Alright So I researched as best as possible on this as there are several ways to go about this. I have a 2011 11" MBA and I guess from what people have said I was able to boot using command+option+R. This brought me to internet boot (I forget what it was called), and I was able to wipe the SSD from there. Now everything seems to be good to go, the MBA starts up as if I bought it brand new with the set up screen. My big question is, how effective was this wipe? I did the most basic option which didn't take much time at all. I just don't want some computer genius buying this machine and using it to gain access to my info (far fetched thinking, but just want to be safe). Was there a better, safer way about wiping my SSD or do you think I am fine to go ahead and sell this?