I follow in his footsteps.

Re-suggestion due to changed Mini's, and thanks to Foamy and 6.50 for the info!

Sale 1:

https://backpack.tf/profiles/76561198078557778#!/compare/1524700800/1524787200

https://backpack.tf/profiles/76561198095236132#!/compare/1524700800/1524787200

Sold for Nebular Translator(217.5) + PE Hellmet + 16 keys

Hellmet Mini:

https://backpack.tf/suggestion/5b1cae83cf6c753a4314b4d4

Suggestion for 80 keys.

http://www.tf2outpost.com/trade/29617961

B/O of 300 keys.

Total is 217.5 + 16 + 80 = 313.5 keys.

Capping at 300.

Sale 2:

https://backpack.tf/profiles/76561198095236132#!/compare/1525219200/1525305600

https://backpack.tf/profiles/76561198187025949#!/compare/1524700800/1525305600

Sold for D@D Crone + Strange Bubbling Antarctic + 70.53 in sweets.

Antarctic Mini:

https://backpack.tf/profiles/76561198011507712#!/compare/1522540800/1522627200

https://backpack.tf/profiles/76561198278646289#!/compare/1519430400/1522713600

https://steamcommunity.com/market/listings/440/Strange%20Unusual%20Antarctic%20Eyewear

Sold on SCM, for $72.61 CAD.

Keys then at 3.13 CAD

72.61 / 3.13 = 23.20 keys

D@D Crone Mini:

https://backpack.tf/suggestion/5afb94a7cf6c75446822ea7c

Suggestion for 320 keys

Total is 320 + 70.53 + 23 = 413.53 keys.

Taking 410 keys.

Sale 3:

https://marketplace.tf/items/920;5;u9

https://backpack.tf/item/5397571737

Sold for 650 USD, keys at 1.96

Total is 331.63 keys

Sales @:

300, 331.63, 410

https://i.imgur.com/fyWSbxK.jpg

New seller at 400, unsold for close to a month.

According to previous information, the 300 sale may be an outlier based on the seller wanting very specific hats at first:

http://www.tf2outpost.com/trade/29615083

Then lowering the B/O for quick pure.

Going with 330 - 410 keys.