1 year old price!

Sale 1:

Sold for Flies Killer's Kabuto (1.7*0.9) = 1.53 (rounding to 1.5)

http://www.tf2outpost.com/trade/23830875

http://backpack.tf/profiles/76561198117617354?time=1417334400

Sale 2: (invalid sale)

Unable to identify sale

http://www.tf2outpost.com/trade/22741439

Sale 3:

Sold for EOF Batter's Helm (1.5*0.9) = 1.35 (rounding to 1.4)

http://www.tf2outpost.com/trade/23761727

http://backpack.tf/profiles/76561198095756294?time=1416729600

Sale 4: (invalid sale, unpriced hat)

Sold with Strange Professional Gunslinger + Strange Huntsman + Sweets for Stare From Beyond Texas Ten Gallon

http://www.tf2outpost.com/trade/23751849

http://backpack.tf/profiles/76561198045774774?time=1415865600 → http://backpack.tf/profiles/76561198045774774?time=1416247049

Sale 5:

Sold for *EOF Football Helmet (1.3*0.9) = 1.17 (rounding to 1.2)

http://www.tf2outpost.com/trade/23165540

http://backpack.tf/profiles/76561198098801806?time=1414189312 → http://backpack.tf/profiles/76561198098801806?time=1414220400

Mini for EOF Football Helmet:

http://www.tf2outpost.com/trade/23492588 - B/O of 1.1 buds

http://www.tf2outpost.com/trade/23490493 - sold for Stormy Storm Katyusha (1.5*0.9) = 1.35

http://www.tf2outpost.com/trade/23390302 - sold for Terror-Watt Counterfeit Billycock (1.55*0.9) = 1.395

Valuing final price at ~1.3 buds

Notes:

For valuing the buds, I'm using the price at the time of sale.

Conclusion:

Sales at 1.2, 1.4, 1.5. Valuing final range at 1.2-1.5 buds.

http://www.tf2outpost.com/trade/23761727 - was willing to accept 1.5 buds

Feel free to support/counter my suggestion!