10 month old price!

Sale 1:

Sold for 179 TF2 keys + 20 CS:GO keys + sweets = >200 keys (B/O caps it at 200 keys)

http://www.tf2outpost.com/trade/27995742

http://backpack.tf/profiles/76561198158742903/#!/compare/1458864000/1458950400

http://i.imgur.com/D6xbpiI.png | http://imgur.com/a/DWPyx

Notes:

Only recent sale in the past few months; none other currently on the market.

The current owner has been collecting keys for the past 1-2 months just to buy this so it's safe to say he doesn't have any intentions of reselling it.

Conclusion:

One valid sale at 200 keys. Taking a final flat price of 200 keys.

Feel free to support/counter my suggestion!