resuggesting; 4 month old price!

Sale 1: (sold within 40 minutes; outlier)

Sold for 18 keys

http://www.tf2outpost.com/trade/25879017

http://backpack.tf/profiles/76561198083772462?time=1430809200 - before

http://backpack.tf/profiles/76561198083772462?time=1430982000 - after

http://i.imgur.com/k7VgUPf.png

Sale 2: (outlier)

Sold for 15 keys

http://www.tf2outpost.com/trade/25869830

http://backpack.tf/profiles/76561198113506213?time=1430636400 - before

http://backpack.tf/profiles/76561198113506213?time=1430809200 - after

http://i.imgur.com/RBNEaRT.png

Sale 3: (credits to aaroncsn for providing the sale)

Sold for 20 keys (20 keys with matching histories). The other two were probably used to buy those miscs.

http://www.tf2outpost.com/trade/25462921

http://backpack.tf/profiles/76561198113506213?time=1427266800 - before

http://backpack.tf/profiles/76561198113506213?time=1427612400 - after

http://i.imgur.com/NTAiK3C.png

Notes:

Previous suggestion: http://backpack.tf/vote/id/55581a59b98d88c0028b45a0

http://www.tf2outpost.com/trade/25610520 - B/O of ~15 or 21 keys? (>1 month)

http://www.tf2outpost.com/trade/25869830 - B/O of 20 keys

Conclusion:

One valid sale at 20 keys, and two outliers at 15 and 18 keys, alongside with B/Os revolving around ~15-20 keys. Taking a final price of 20 keys flat.

Feel free to support/counter my suggestion!