Counter-suggestion, all thanks for proof goes to Icy

Taking original middle value of unusuals and applying the 10% overpay rule

Sold

1. http://www.tf2outpost.com/trade/14938112 - Sold for 21 keys + sweets. http://gyazo.com/fb9bb5ea78cbea34c9ca63a0ef993bd9

2. http://www.tf2outpost.com/trade/14956406 - Sold for a Memory Leak Ballcap (2.1-2.2 buds) http://i.imgur.com/Bob5amM.png

3. http://www.tf2outpost.com/trade/14963471 - Sold for Roboactive Hetmans (2.3-2.4 buds) http://imgur.com/7tLYDJ8

4. http://www.tf2outpost.com/trade/14086053 - Sold for 57 Keys. I had to look at his/her backpack history to see what he/she sold it for.

Offers

1. http://www.tf2outpost.com/trade/14474866 - Best pure offer is 25 keys.

2. http://www.tf2outpost.com/trade/14329883 - Best pure offer is 1.8 buds, but he wanted 2 buds.

Based on the pure offers, the 21 key sale is an outlier.