Seems to be obtainable for below 1.33 ref quite easily, but selling for 1.33 isn't impossible either.

Currently 8 on Classifieds for sale below 1.33 ref.

http://backpack.tf/stats/Strange/Pretty%20Boy's%20Pocket%20Pistol/Tradable/Craftable

1.00 ref

http://www.tf2outpost.com/trade/20384011

http://www.tf2outpost.com/trade/20383001

http://www.tf2outpost.com/trade/20315635

http://www.tf2outpost.com/trade/20346995 (uncraft, so make what you want out of it)

I put a trade up buying them for 1 ref and got a few trade offers while I was gone, not sure if they count for anything.

http://puu.sh/9wHSy/0ea277f10b.png

http://puu.sh/9wHTu/391df4682b.png

http://puu.sh/9wHUY/c7a854d610.png

1.11 ref

http://www.tf2outpost.com/trade/20304668

http://www.tf2outpost.com/trade/20352292

1.22 ref

http://www.tf2outpost.com/trade/20354617

http://www.tf2outpost.com/trade/20260968

http://www.tf2outpost.com/trade/20129250

1.33

http://www.tf2outpost.com/trade/20341439 2 days

http://www.tf2outpost.com/trade/20346799 2 days

http://www.tf2outpost.com/trade/20342307 2 days

http://www.tf2outpost.com/trade/20346406 2 days

http://www.tf2outpost.com/trade/20348171 2 days

http://www.tf2outpost.com/trade/20324894 3 days

http://www.tf2outpost.com/trade/20316183 3 days

http://www.tf2outpost.com/trade/20321497 3 days

http://www.tf2outpost.com/trade/20316112 3 days

http://www.tf2outpost.com/trade/20314302 3 days

http://www.tf2outpost.com/trade/20297131 4 days

http://www.tf2outpost.com/trade/20309750 4 days

http://www.tf2outpost.com/trade/20265385 6 days

http://www.tf2outpost.com/trade/20221198 1 week

http://www.tf2outpost.com/trade/20093194 2 weeks

http://www.tf2outpost.com/trade/20129250 2 weeks

http://www.tf2outpost.com/trade/20002253 3 weeks

http://www.tf2outpost.com/trade/19251546 2 months?

http://www.trade.tf/price/773/11/None

trade.tf currently puts this item around 1.11-1.33