Hello. I think time has came for this.

Sales going for 4 keys:

http://www.tf2outpost.com/trade/11963856 - 1 day

http://www.tf2outpost.com/trade/11615785 - 1 week

http://www.tf2outpost.com/trade/11841767 - 4 days (some adds 4 days ago)

http://www.tf2outpost.com/trade/11988594 - 1 add in 5 hours

http://www.tf2outpost.com/trade/11958897 - 1 day old, add 50 minutes ago

http://www.tf2outpost.com/trade/11866691 - 4 weeks, sold

and others...

Also i was offering here, to see the reaction of owner:

http://www.tf2outpost.com/trade/11994322

http://www.tf2outpost.com/trade/10856751

http://www.tf2outpost.com/trade/11973849

http://www.tf2outpost.com/trade/11798544

http://www.tf2outpost.com/trade/11850204 (hidden 2 days ago)

Selling for less than 4 keys

http://www.tf2outpost.com/trade/11980497 - 3.9 keys

http://www.tf2outpost.com/trade/11967098 - 3.6 keys(sold)

http://www.tf2outpost.com/trade/11959626 - 3.8 keys

http://www.tf2outpost.com/trade/11720039 - 3keys+craft hat

http://www.tf2outpost.com/trade/11912008 - 3.5 keys

http://www.tf2outpost.com/trade/11945780 - 3.5 keys

Others are 4 day old and most are 6 key sellers

Buyers:

http://www.tf2outpost.com/trade/11273342 - bought a lot at 3.6 and 3.4

other buyers wants at 3-3.2keys, idk how many bought.

Maybe somebody will take that as proof:

http://backpack.tf/classifieds/search/5068/6/50

Finally - my boughts:

http://cs319831.vk.me/v319831373/968d/ZYXc3fvIhk8.jpg

http://cs319831.vk.me/v319831373/9696/gjhkpobagLQ.jpg

http://cs319831.vk.me/v319831373/969f/Bwkg3TF6AyM.jpg

Conclusion: this crate selld good at 4 keys, but there are many 3.6-3.8 keys sales too. My proof is very little because I don't know how to see sold trades on outpost ;C. If someone will add more proof, it will be great. Anyway, that's my first suggestion, so I'm taking critics too :)