links 3 and 5 are invalid. (for they try to predict the future) But the other links provide enough proof for me to upvote!

I agree that these should be higher, I sell out quickly at 8 keys so I put them at 8.5 now. I think 8.5 is the general price but I could see people paying 9 for them.

I don't see a single one being sold at 9 on your links. Please prove me wrong.

The first two trades have offers of 8.5 and 9 keys respectively.

^Missed that, thanks.