How come this has not yet been sold!
I "upgraded" from my 2015 MacBook Air to one of these, late last year (damn!). The "old" one was still working just fine after 10 years of heavy use, no battery problems, as fast as a fast thing on ice, almost as new to look at. Just fancied a change.
If you have a doubt on buying secondhand, my first Air was bought from a chap on this site back in 2011 and it is still going strong today.
As many say, if I hadn't bought mine last year, this one would be on its way to me by now.
GLWTS