I love dogs.

https://backpack.tf/item/4943357409

Sale 1) Sold for 18 Keys

https://backpack.tf/profiles/76561198125791160#!/compare/1547078400/1547164800

https://backpack.tf/item/5404925745

Sale 2) Sold for 19 Keys

https://backpack.tf/profiles/76561198011321852#!/compare/1546819200/1546992000

https://backpack.tf/item/6513088359

Sale 3) ?

https://backpack.tf/profiles/76561198334598690#!/compare/1541635200/1541721600

https://backpack.tf/profiles/76561198092524382#!/compare/1541116800/1541808000

https://backpack.tf/item/7015004024

Sale 4) Sold for a Blizzardy Storm Airdog (12 Keys) + ~7 Keys of Items

https://backpack.tf/profiles/76561198080179568#!/compare/1544054400/1544140800

12 + 7 = 19 Keys

Blizzardy Storm Airdog Mini

https://backpack.tf/profiles/76561198061489334#!/compare/1547683200/1547769600 - Sold for 11 Keys

https://backpack.tf/profiles/76561198080179568#!/compare/1545955200/1546041600 - Sold for 13 Keys

https://backpack.tf/profiles/76561198199803242#!/compare/1546819200/1546905600 - Sold for 11 Keys + 21 Refined

https://backpack.tf/profiles/76561198345310822#!/compare/1546560000/1546905600 - The Terror-Watt Capuchon sold for the Keys in the above sale

That's why the histories of the Keys don't match.

Sale 5) Sold for Bubbling Pomade Prince

https://backpack.tf/profiles/76561198336715433#!/compare/1544745600/1544832000

Fits in the range.

Pomade Mini

https://backpack.tf/profiles/76561198374540031#!/compare/1545177600/1545350400 - Bought for an Orbiting Fire Ye Olde Baker Boy (16.5 Keys)

https://backpack.tf/profiles/76561198374540031#!/compare/1545177600/1545350400 - Sold for a Green Confetti Glengarry Bonnet

https://imgur.com/a/PWuXB9Q - Seller at 15 Keys. 22 Day Unsold at 17 Keys.

Sale 6) Sold for 18 Keys

https://backpack.tf/profiles/76561198046921199#!/compare/1545696000/1545782400

https://backpack.tf/item/6832316440

Sale 7) ?

https://backpack.tf/profiles/76561198426804562#!/compare/1540598400/1540771200

https://backpack.tf/profiles/76561198107909756#!/compare/1540598400/1540684800

Sale 8) Sold for 14 Keys + 17 Refined

https://backpack.tf/profiles/76561198107909756#!/compare/1540684800/1540857600

Low outlier.

Sale 9) ?

https://backpack.tf/profiles/76561198161339185#!/compare/1546905600/1547078400

https://backpack.tf/profiles/76561198348057478#!/compare/1546819200/1547078400

Sale 10) Sold for 16 Keys

https://backpack.tf/profiles/76561198348057478#!/compare/1547164800/1547251200

Sale 11) Sold for a Holy Grail Schadenfreude + 10 Refined

https://backpack.tf/profiles/76561198066835150#!/compare/1547683200/1547769600

https://backpack.tf/profiles/76561198801236963#!/compare/1544918400/1547769600

This should be used to update the Schadenfreude.

Sale 12) ?

https://backpack.tf/profiles/76561198801236963#!/compare/1547769600/1547856000

https://backpack.tf/profiles/76561198305494036#!/compare/1547769600/1547856000

https://backpack.tf/item/7056837776

Sale 13) ?

https://backpack.tf/profiles/76561197964171516#!/compare/1543536000/1543622400

https://backpack.tf/profiles/76561198085854531#!/compare/1540425600/1544832000

https://backpack.tf/item/7131514706

Sale 14) Sold for a Spooky Night Boston Breakdance

https://backpack.tf/profiles/76561198417409588#!/compare/1542067200/1542240000

This should be used to price the Breakdance.

Sale 15) Bulk sale for a Strange Clairvoyance Tundra Top

https://backpack.tf/profiles/76561198029534325#!/compare/1542412800/1542499200

Sale 16) Bulk sale

https://backpack.tf/profiles/76561198055622215#!/compare/1543363200/1543881600

Sale 17) Sold for 16 Keys

https://backpack.tf/profiles/76561198015547078#!/compare/1545004800/1545091200

https://backpack.tf/item/7426024993

Sale 18) ?

https://backpack.tf/profiles/76561198057632298#!/compare/1545955200/1546214400

https://backpack.tf/profiles/76561198050760474#!/compare/1546128000/1546214400

Sale 19) Sold for 12 Keys

https://backpack.tf/profiles/76561198050760474#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198069969998#!/compare/1546300800/1546387200

Low outlier.

Sale 20) Quicksold for 14 Keys + 2 Refined

https://backpack.tf/profiles/76561198069969998#!/compare/1546300800/1546387200

Sale 21) Sold for a Circling TF Logo Engineer's Cap + 1 Key

https://backpack.tf/profiles/76561198126679929#!/compare/1546560000/1546646400

https://backpack.tf/profiles/76561198320711105#!/compare/1546560000/1546646400

Using this sale to price the Engineer's Cap.

Sale 22) Sold for a Duped Steaming Cosa Nostra Cap (13.5 Keys) + 2 Keys

https://backpack.tf/profiles/76561198320711105#!/compare/1546646400/1546732800

Rounds to 16 Keys

Sale 23) Sold for 15 Keys

https://backpack.tf/profiles/76561198125917042#!/compare/1546732800/1546819200

Sale 24) Bulk sale for a Starstorm Slumber Tipped Lid

https://backpack.tf/profiles/76561198067840183#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198079578383#!/compare/1547078400/1547164800