Just showing what I paid for/Trying to put a price on this/Also showing the history of this hat

Swapped hands from creator (Person who finished kit [MiT]Chemii!) to second owner (MattasaurousRex) for Dead Presidents Belgian Detective -http://www.tf2outpost.com/trade/17163536 - Cannot be used as proof since this unusual has no price. I just wanted to show what the trade was for from 1st owner to 2nd owner.

Swapped hands from second owner (MattasaurousRex) to third owner (TofuDog) for an unknown price. I could not find any evidence of TofuDog offering on the hat, It must have been sold in private. Don't know if that affects the outcome of this suggestion.

Swapped hands from third owner (TofuDog) to fourth owner (MIRPKCIN) for a Misty Skull Jumpers Jeep Cap

Offer on outpost - http://www.tf2outpost.com/trade/17597479

Evidence of transaction - http://imgur.com/z5ucKME,wFU3sVs#0

http://imgur.com/z5ucKME,wFU3sVs#1

Maths

Im thinking about 3.8 buds to be the reasonable sale price considering it costs 1.33 for 1 Slope Scoper and you need 200 to craft this so -

1.33 ref * 200 = 266 ref

266 ref ÷ 7.11 ref (Price of key) = 37.41 keys

37.41 keys ÷ 20 keys (High range price of bud) = 1.8 buds

or

37.41 key ÷ 19 keys (Low range price of bud) = 1.9 buds

37.41 keys ÷ 19 keys (Low range price of bud) = 1.9 buds

Leave some comments below try and keep them on topic I could really use help pricing this. Leave some constructive criticism below as well thanks for reading this and for your time and have a wonderful day