Sale #1

Sold for a Circling TF Logo rimmed raincatcher + 4 keys

(16*0.9+4) = ~19 keys

BP Before

http://backpack.tf/profiles/76561198080179568?time=1443250800

BP After

http://backpack.tf/profiles/76561198080179568?time=1443337200

Sale #2

Sold with 27 keys for a KaW Head Warmer & TaW Western Wear

~<10 keys

Taking as an outlier.

BP Before

http://backpack.tf/profiles/76561198057091213?time=1442300400

BP After

http://backpack.tf/profiles/76561198057091213?time=1443423600

Sale #3

Sold with a Stormy Storm Your Worst Nightmare & 3 keys for a Cauldron Bubbles Reggaelator

BP Before

http://backpack.tf/profiles/76561198094689757?time=1440831600

BP After

http://backpack.tf/profiles/76561198094689757?time=1441004400

Sale is better to update the reggae.

Conclusion

No more valid recent sales, taking final price of 19 keys.