Mkay.

Sale 1: http://backpack.tf/profiles/76561198091706202#!/compare/1485648000/1485734400

Sold for 23 pure.

Sale 2: http://backpack.tf/profiles/76561198028202642#!/compare/1486425600/1487376000

Sold for 24 pure.

Sale 3: http://backpack.tf/profiles/76561198135140709#!/compare/1488672000/1488758400

Sold for 18 pure.

Sale 4: http://backpack.tf/profiles/76561198074389131#!/compare/1488931200/1489017600 - ?

Sale 5: http://backpack.tf/profiles/76561198074389131#!/compare/1489363200/1489449600

Sold for a Clean Circling Peace Sign Glasgow Great Helm (26 keys)

Sale 6: http://backpack.tf/profiles/76561198351976088#!/compare/1489449600/1489536000

Should be used to price the taunt.

Sale 7: http://backpack.tf/profiles/76561198089087585#!/compare/1489536000/1489795200

Sold for 20 pure.

Sale 8: http://backpack.tf/profiles/76561198116795203#!/compare/1489708800/1489795200

Sold for 20 pure.

Sale 9: http://backpack.tf/profiles/76561198116795203#!/compare/1489968000/1490054400

Should be used to update the Chieftain.

Sale 10: http://backpack.tf/profiles/76561198088975567#!/compare/1490054400/1490140800 - Uhh.

Sales: 23, 24, 18, 26, 20 and 20. Quickseller at 22: http://i.imgur.com/fCwPWXg.png. Going with a range of 24-26.