After reviewing the newest trade and fixing the info from trade 2, the conclusion was made that the sale at 4.3 Buds was the outlier. Range has been recorrected and resubmitted.

3 of these hats exist with enough sales data in the past three months to set a range.

Here is my proof:

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Sale 1

(Outlier)

Bonzo Toy Tailor traded 1:1 with a Sulphurous Towering Titanium Pillar of Hats (4.8 Buds).

Total = 4.8 buds * .9 (Overpay) = 4.32 Buds, rounded to 4.3 Buds.

Before: http://backpack.tf/profiles/76561198042258870?time=1425283200

After: http://backpack.tf/profiles/76561198042258870?time=1425456000

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Sale 2

Bonzo Toy Tailor was sold for 3 Buds Pure and about 4 keys in sweets.

Total = 3 Buds plus about .2 in sweets after overpay = ~3.2 Buds.

Before: http://backpack.tf/profiles/76561197983099701?time=1423382400

After: http://backpack.tf/profiles/76561197983099701?time=1423468800

Seller After: http://backpack.tf/profiles/76561198042405582?time=1423542345

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Sale 3

Bonzo Toy Tailor was traded for a Terror-Watt Sergeant's Drill Hat (1.85 Buds) and a Miami Nights Hot-Dogger (1.5 Buds).

Total = (1.85 Buds) + (1.5 Buds) = 3.35 Buds. 3.35 Buds * .9 (Overpay) = 3.01 Buds, rounded to 3 Buds.

Before: http://backpack.tf/profiles/76561198042405582?time=1418803200

After: http://backpack.tf/profiles/76561198042405582?time=1418889600

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Sale 4

Bonzo Toy Tailor was traded 1:1 with a Disco Beat Down Bubble Pipe (2.95 Buds).

Total = 2.95 * .9 (Overpay) = 2.65 Buds, rounded to 2.7 Buds.

Before: http://backpack.tf/profiles/76561198085540473?time=1418284800

After: http://backpack.tf/profiles/76561198085540473?time=1418371200

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Sale 5

Bonzo Toy Tailor sold for 2 Buds and 8 Keys Pure. (Buds were 13 Keys at the time.)

Total = 2.612 Buds, rounded to 2.6 Buds.

Before: http://backpack.tf/profiles/76561198015223654?time=1418025600

After: http://backpack.tf/profiles/76561198015223654?time=1418198400

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Thanks to everyone who helped in the last suggestion!

Once again, if an error has been made in my calculations, kindly let me know and I can fix and resubmit the price suggestion. Thanks a ton you guys!