No offence, but it is kind of a stupid question, in some respects....
You state that there are so many other knives you would rather have than a civvy, and if this is the case than of course it makes no sense to you, since you obviously do not regard the Civilian as some other individuals do, so in that case... why would you bid $500 for a knife that does not really appeal to you ???
Common sense really,... your question has been answered by the next sentence in your post.
Why would anyone in the world bid over $500 for a Civilian ??
There obviously are reasons, and some people obviously do feel that it is worth bidding that much for, since they, including myself did,.. but then again, you wouldn't understand these reasons,... because, it would make no sense to you at all,..... and you would rather some other knife "50X" more than a Civilian.
So let me ask, would you bid $500 for one of those knives which you would rather "50X" more than a Civilian ???
If so, then why ???
These may seem like stupid questions, but they are yours, and once you figure them out, you will have your answers, and all it took was a little expansion on your post........
...but then again, there's no such things as stupid questions......
....... only stupid people.