Macs may or may not hold value well, but they certainly hold UP very well. I had an iBook last four tough Iraq deployments whereas PCs were dying left and right. My friends that had Macs were in similar situations to me.
Well even if the hardware survives, Apple will make a door stop out of it soon enough. often well before the hardware's useful life.
I'm running Win 8 on a circa 2006 Portege M400 with a Core Duo and 2 Gb ram. It flies. I do everything on it-net, email, office, media playback, youtube, streaming etc
I doubt any circa 2006 Apple product can even run a current we browser.
PC for me all the way.