I don't have enough proofs on Razor Cut Unusuals,so atm i will suggest any others.

Sale 1

Before: http://backpack.tf/profiles/76561198089945713?time=1412751600

After: http://backpack.tf/profiles/76561198089945713?time=1412924400

25/15(October price of buds)= ~1.7

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Sale 2

backpack.tf shows not correct item owners,but OP shows it.

http://www.tf2outpost.com/trade/23100238

http://www.tf2outpost.com/trade/23090421

Anyway looks truthfully.

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Engi mini

Before: http://backpack.tf/profiles/76561198069593872?time=1414911600

After: http://backpack.tf/profiles/76561198069593872?time=1415001600

2.3*0.9= 2.1

And 2.1*0.9=1.9

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Tam mini

Before: http://backpack.tf/profiles/76561198096323422?time=1413442800

After: http://backpack.tf/profiles/76561198096323422?time=1413529200

Tam(1.5)+ Engi(1.9)= ~3.4

Since 1.5 is max point of range for unusual i will up my low value,and down my high value. 1.85-3.25

Seems not so rude,because i could made some mistakes in price of currenies in past