Originally posted by dgaies Agreed that they won't drop like rocks. In my last post I just meant that as people start replacing them (which might be over the next year) the price of used Kx and K7 bodies should go down.
As for the K20D, I feel that's kind of a special case in that there are a lot of people who felt the K20D was superior to the K7 that replaced it. Either because of the physical size of the K20D or the better noise handling at high ISO, there were things about the K20D that helped keep it's used price somewhat higher than it might have otherwise been.
Fact is, we don't really know yet. I'm going by watching prices over the last several months as I've thought about buying another K20d. For what reason, I don't know. I sold mine shortly after I bought the K7.
There are features people are willing to pay money for and they may not care about other features. It won't ever be worth the original price but the K10d, can turn off DFS, and if you have one not updated to 1.31 (mine is still at v1.00), you can backdate the FW to 1.20 to turn off SDM. Many think the ISO performance of the K10d between 100-400 is better than the K20d. Those three things, I think, keep the K10d a desirable camera.
The K20d is a very nice machine as well and I think it was a significant improvement over the K10d in many areas. Slight re-design in the buttons, the size and form of it's predecessor, grip-less, I actually prefer it over the K7. I paid $175 for a grip on the K7 because it was too small for me.
Feature to feature, the K7 still stacks up pretty well against the K5. Those needing or wanting the faster AF and high ISO performance, AND willing to pay for it, may be looking to dump their K7 (20,10, etc). For everyone else, the K7 will still be the way to go. I for one, am still learning how to get the best out of mine. I would say a previously mentioned price of $650 for a used one, sounds quite reasonable for a -1 generation flagship camera.
You may be correct though. Out of the box, comparing the K7 against the K20d, there were a number of things I did not like about the K7 (still don't). I hate what they did to the button layout for a larger screen for instance. I hate even more, the locking mode dial. The AE-L button is directly where my thumbprint rests. That may be fine for some but to me, it's a negative. Both the 10 and the 20 have tethering. Removing it for the K7 (and I assume the K5) is a move I'm still scratching my head about.