Yes, interesting topic.
Here's what I don't understand,
I see for sale items where the seller says "It's new, mint, still in the shipping box" and he's selling it for 1/2 of what he paid for it. To me that means he's losing money from the get-go.
Why would anyone buy something new (and maybe at MSRP), then turn around and sell it for 1/2 price? The only reason I can think of is the seller spent too much and now the bill is due, unless what he's saying isn't the whole truth.