Countersuggestion. 3 months old price. Other suggestion shows some sales >1.33, but 1.33 is clearly the most commonly bought/sold price.

1 ref is a quicksell (hard to get these even on good deals section)

http://www.tf2outpost.com/trade/13389652

Mass sellers at 1.33 ref that have sold many and have many in stock:

http://www.tf2outpost.com/trade/10500997

http://www.tf2outpost.com/trade/13377981

http://www.tf2outpost.com/trade/13213488

http://www.tf2outpost.com/trade/12277643

http://www.tf2outpost.com/trade/13377880

http://www.tf2outpost.com/trade/12682030

http://www.tf2outpost.com/trade/12395048

Other sellers at 1.33 ref

http://www.tf2outpost.com/trade/13381199

http://www.tf2outpost.com/trade/13337600

http://www.tf2outpost.com/trade/13407459

http://www.tf2outpost.com/trade/13330061

http://www.tf2outpost.com/trade/13273515

http://www.tf2outpost.com/trade/12079768 - offered 1.33

http://www.tf2outpost.com/trade/13357226

Some sellers can sell for 1.66:

http://www.tf2outpost.com/trade/8942819

Other suggestion shows a few more >1.33. But with so many mass sellers at 1.33, I see 1.33 flat being the primary bought and sold price for this. A few get sold at <1.33 just as some get sold >1.33