[timtadh]

Going from $500 - $700 to $100 is a pretty big depreciation in my book. I guess it is better than going to $0 if that is what you are comparing it to. However, if you compare it to a durable good I do not imagine it compares well. (Example durable good: well built wood furniture)

[Sanddancer]

Compared to good furniture, yeah, but things like a car or a microwave will have a depreciation curve closer to what the iphone has.

[paulcole]

Why would I compare to well-built wood furniture?

Let's do a comparison that makes sense. The Samsung Galaxy S3 (released at roughly the same time)is currently selling on eBay for $20-50.