Please read all before voting. I wouldn't like playing football in the rain TBH. 5 Month Old Price, 5 on the Market.

Sales:

http://www.tf2outpost.com/trade/14036840 - Sold for a Vintage Luger (6) + Big Kill (11.5) = ~18

Legit Trades:

http://www.tf2outpost.com/trade/14457594 - Willing to accept a Smoking Birdcage (~19)

http://www.tf2outpost.com/trade/14445001 - B/O of 20.

http://www.tf2outpost.com/trade/14595015 - B/O of Bud (20)

http://www.tf2outpost.com/trade/14561956 - B/O of 20.

http://www.tf2outpost.com/trade/13430043 - B/O of 20.

CONCLUSION:

Low Range = 18 because of a valid sale. High Range = 20 because of multiple B/Os under the current high range.