Team Fortress 2
Counter-Strike: Global Offensive
imgur.com/KxbU2aX recent 26.33 sale and also http://backpack.tf/classifieds?item=Mann+Co.+Supply+Crate+Key&quality=6&tradable=1&craftable=1&australium=-1 there's a lot of buyers at 26
No where near enough proof for a key suggestion. Please look at previous suggestions.
Key suggestions require a lot more thorough research. As an advice for next time in general: when you use the classifieds, you need screenshots of the classifieds as they were and profiles of buyers/sellers, so that we can monitor them. For key suggestions, you can take a look at previous accepted suggestions to get an idea of the evidence quantity you'll need.