Sale #1

http://backpack.tf/profiles/76561198125791160#!/compare/1460505600/1460592000

Sold with Frostbite Ground Control (115) for Darkblaze KE (525)

= 410

Mini on KE

http://backpack.tf/suggestion/5728a6cd8667475fd31655e0 - 525

Sale #2

http://backpack.tf/profiles/76561197995194055#!/compare/1460592000/1460678400

Sold for AF TC (605) + Arcana Bonk (55)+ 10 keys +~ 9 keys sweets

= 679

Mini for TC

http://backpack.tf/suggestion/571e031683de6b362f2821f4 605

Mini for Bonk

http://backpack.tf/profiles/76561198083922186#!/compare/1462147200/1462233600 - 55 keys

Sale #3

http://backpack.tf/profiles/76561198096962203#!/compare/1462060800/1462233600

Sold with Darkblaze Bonk (280) for GE COTOK (647.5)

= 367.5 - better used on COTOK

Sale #4

http://backpack.tf/profiles/76561198019254407#!/compare/1462060800/1462147200

Sold for Scorching Stash (400) + Beams Razor Cut (180)

= 580

Mini for Stash

http://backpack.tf/profiles/76561198051373930#!/compare/1462320000/1462406400

DbD Prehistoric (285) + CV Glasgow (112)+ Orb Fire Muffs (34) + 3 keys

= 434

http://www.tf2outpost.com/trade/28145608 - seller @ 400

Micro for Glasgow

http://backpack.tf/profiles/76561198047706237#!/compare/1462147200/1462233600

Sold with 7 keys sweets for BF Guad (~83) + Spec KS Aussy Flame (19) + 10 keys sweets

= 112

Sale #5

http://backpack.tf/profiles/76561198123097664#!/compare/1461974400/1462147200

Used in Ghosts Law suggestion

Sale #6

http://backpack.tf/profiles/76561198124846866/#!/compare/1457164800/1457251200

http://backpack.tf/profiles/76561198043457018/#!/compare/1457164800/1457251200

Sold for Duped Burning Bonk (390) + Bubbling Hazmat (97.5) + Corona Australis (15) + 12 keys

= ~515

https://gyazo.com/2c5423409e4382131c39597c7246aaea - seller ~ 390 for bonk

Sales at ~370, 410, 515, 580 and 680

Going in the middle and taking 515 as it seems to show the average selling price

Any advice on this would be greatly received