Also, some have been selling for a VERY long time.

I think 7-10 would be more accurate, since in your 5th link someone sold 3 of them for 10 keys, and your 1st link is only 14 hours old.

Woah, why does it show up as a Fancy Dress Uniform http://i.imgur.com/jCTGI.png

Edit: It's because I am using the tf2b iconset

that's surprising I do see quite a lot of people collecting crates and these are very rare..but very good proof although I agree 7-10 might be a better range..still gonna upvote