why are there so many used ones for sale?
Because the market is where the rubber meets the road. Whole lot of stuff sounds just great until you get it home. That is why a big part of learning to read reviews is learning to read actual user comments. All the gear I have bought for something like a dozen years now has been based entirely on reading on-line. Almost never do I ask any questions like on here. It is pointless. All the questions have been asked and answered a million times over. Search around you will find your answer.
Even this one right now. The answer is when there are a lot for sale then they really aren't all that, never were, probably never will be. There's way more guys looking to make a deal than build a system. They talk otherwise but there's two ways to judge- by talk, and by actions. By their actions they demonstrate their unseriousness.
So one of the last clues after doing all your research is to look at the used market. When you come up empty you know you are on the right track. When you have to wait for delivery, even better! These things are telling you people by their actions have voted with their dollars that these are the truly good components.
