There are plenty of other sales:

http://backpack.tf/profiles/76561198038076501#!/compare/1459987200/1460332800

http://www.tf2outpost.com/trade/28010116 - sold for 50 keys

http://backpack.tf/profiles/76561198209918180#!/compare/1461628800/1461715200 - sold with ~13 keys of sweets for SFB Defiant Spartan (puts the rotation at 23 keys so that might be an outlier)

http://www.tf2outpost.com/trade/28044532 - untrackable (foamy will probably be able to provide further info on this)

http://backpack.tf/profiles/76561198008751185#!/compare/1457078400/1457164800

http://www.tf2outpost.com/trade/27846587 - sold for spec. aus. scatter (40) + steaming head warmer (19.5) = 59.5, rounds to 60

http://backpack.tf/profiles/76561198095094016#!/compare/1458950400/1461456000 - sold with misty cannon for secret tyrolean, can probably be used for the tyro, many sales ~200 for it

http://backpack.tf/profiles/76561197991710013#!/compare/1457251200/1457337600

http://www.tf2outpost.com/trade/27900827 - untrackable

http://backpack.tf/profiles/76561198092673085#!/compare/1461715200/1461801600 - highly doubt this isn't bulk

http://backpack.tf/profiles/76561198091874585#!/compare/1459728000/1460764800 - extremely low, welcome to shark city?

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I'd go with a range of 50-60, using your sale at 60, the sale at 60 I've provided, and the pure sale at 50.