I don't see why the 920 being the lowest end LGA1366 matters.
If a lower end chip can do higher or same clock with less voltage than a higher end chip(because some of the 950 and 960 are just trash when it comes to overclocking) then I'd pay more for the lower end chip.
To someone on an LGA 1366 platform already, how much value does a Core i7 920 have, when most people have at least that, if not more? Exactly. Okay, maybe some good Core i7 920s overclock better than some other higher modles, but realistically, let's see a number of hands of those with Core i7 950s or Core i7 960s who will pay $200 on a used Core i7 920...
On the other end of the spectrum, to someone not on an LGA 1366 platform, Who is going to pay $200 for that used CPU when a much better and brand new and covered by warranty Core i5 2500K is barely more expensive? Exactly.
That makes all of the difference. That is why.
I'm not calling the CPU bad, not by any means! It is a fantastic chip. I'm just saying, that's how it is and if you want to be realistic, that's what I'd say it's worth. Feel free to disagree. I'm sure there exist others that may pay more. Value is subjective, and factoring in my reasoning above, I would not say that used CPU is worth $200, even at those clocks.
Edited by Princess Garnet - 8/10/11 at 12:36pm