This is not an ad, just an experiance I'd like to share 
I recently advertised an AMD X2 4800 939 CPU for sale, and I'm absolutely shocked at the interest/offers i'm getting for an obselete spec. I set a high price on the ad for haggling and got an immediate offer + more, I may actually make a profit! My old 3200 mem is in high demand too.
Same thing happened when I sold my old A64 3400 a few months back, I got a solid price.
I'm guessing it's market forces working - people who want to upgrade and still hold onto their old components, seem to be willing to pay more for one component rather than upgrade three all together.

I recently advertised an AMD X2 4800 939 CPU for sale, and I'm absolutely shocked at the interest/offers i'm getting for an obselete spec. I set a high price on the ad for haggling and got an immediate offer + more, I may actually make a profit! My old 3200 mem is in high demand too.
Same thing happened when I sold my old A64 3400 a few months back, I got a solid price.
I'm guessing it's market forces working - people who want to upgrade and still hold onto their old components, seem to be willing to pay more for one component rather than upgrade three all together.