YAAAAAAAAWN.
You take what YOU would do and make it sound like everyone does that, at the end of the day there is a massive market for used/second hand computers.
If you buy things new then throw them away and buy another one new, even though you now you could have sold it then more fool you.
just because you dont sell your machine on doesnt make it ludicrous that the resale price can be a factor.
In fact Apple and lots of others manufacturers like Dell sell refurbished machines for slightly cheaper, which is essentially the same thing!