I was trying to shift a perfect condition iMac 2years old and had to settle with barely 50% of cost price. So basically the same as any other item. I remember when I sold my iBook for almost what I bought it for, thats after 2 years of use too. I did some research on ebay/gumtree/private listings to see if there were any trends (UK). I noticed people were seriously flogging their macs at bargain bin prices. Macbook pros only a year old going for less than 50%, some even lower than that. I don't want to link here just incase of getting banned for trying to advertise but go have a look yourselves at your auction sites etc. Aren't there a ton of macs just sitting there at high prices with zero bids? It's a shame really, used to be a selling point of the mac that you could get sometimes 80%-90% of what you paid back which was very unusual for computers since they go out of date the second you buy them.