Id love to see some facts on you comment saying macs last longer i personally believe its in how the computer is maintained
secondly after having a quick look on a few online auction sites in my country and find there are bucket loads of old PC selling for $400-600
so you can basically wipe half of your *Cost of ownership* as its equal and it is in the end how you treat your computer
For the most part, the longevity of a system is determined by build-quality, day-to-day usage, and the environment it's placed in. Secondary factors include type of stuff it's being used for and type of OS. Windows by nature will degrade over time, prompting a slower system - it's just the way it is. The code and file systems of non-Windows machines are different, hence that's not an issue. That *could* be what he meant.
Just curious, but what country do you live in? Depending on where you are in the world has a lot to do with initial price/resale of parts/systems. Something that costs me $100 in the US might cost someone in the UK $125 (random example - I've no idea the US/UK exchange rates). Exchange rates aside, it simply might just be harder to get a specific piece of technology there, so the price goes up accordingly.
Also, you mentioned *auction* sites...that's hardly a real representation of true going-rates. For example, I frequently scour ebay for used Dell laptops for various reasons and am amazed at what some of them are listed for as 'Buy It Now'. Sorry, but an 8 year old P3 with 512 RAM and a refurbished 40 Gig HDD is *not* worth $325. Then of course you have the people who basically run scams and try to take advantage of others, hoping that the technological-ignorance of the masses will prevail and they can make a few quick bucks. Anyone with half a brain can hype up a system and make it sound awesome. Hell, give me 10 minutes, and I'll find a way to make a IIGS sound like a steal for 'only $450'!
Not trying to pick a fight here, just give examples. The Lark was specifically trying to avoid the measure-fest that always seems to follow this topic by giving *real* *specific* *logical* reasons that actually matter, rather than the customary
"My Mac is pretty! Why do people use Windows? LOL" "Shutup noobzor, your Mac is teh sucky" "No you shutup! I don't need anti-virus stuff. Down with M$ HAHAHAHAHA!" "Go away, you suck, your family sucks, your neighbors suck. I'm going to kill your dog. UR a troll. WINDOWS FOREVER!!!!!1!!one!!!eleven!!", and I think he did a fairly straightforward job of it