Kinda a counter-suggestion.

A convervative bump.

Sold for 1.66

http://www.tf2outpost.com/trade/21471984

http://www.tf2outpost.com/trade/21614791

Sold for 1.44

http://www.tf2outpost.com/trade/21496173 - Can't confirm if QS or not.

Sold for 1.33

http://www.tf2outpost.com/trade/21504050 - 1.33 (Not quick-sell, take like more than 1 day to sell)

Selling for 1.33

http://www.tf2outpost.com/trade/21640386

http://www.tf2outpost.com/trade/21430646 - Has a buyer though.

Conclusion: Small market. This is a much safer range than other suggestion as I see. Don't want his proof become a waste.

Feel free to counter / support my proofs.