Blub

http://backpack.tf/item/1737263571

Sale 1) Sold for a Specialized Killstreak Australium Knife (~17 Keys)

http://backpack.tf/profiles/76561198260409757#!/compare/1490486400/1490572800

http://backpack.tf/item/817421452

Sale 2) Sold + 1 Key for a Cloud 9 Amassment

http://backpack.tf/profiles/76561198107079956#!/compare/1491868800/1491955200 - Seller's Backpack

http://backpack.tf/profiles/76561198309188122#!/compare/1491868800/1491955200 - Buyer's Backpack

High Outlier.

http://backpack.tf/item/1340733940

Sale 3) Sold for a Steaming Front Runner (13.5 Keys) + ~3 Keys of Items

http://backpack.tf/profiles/76561198094693231#!/compare/1490227200/1490313600

13.5 + 3 = 16.5, which rounds to 17 Keys

Front Runner Mini

http://backpack.tf/profiles/76561198073438708#!/compare/1490659200/1490918400 - Sold for 13 Keys

http://backpack.tf/profiles/76561198113330382#!/compare/1490918400/1491004800 - Sold for 14 Keys

http://backpack.tf/profiles/76561198272729300#!/compare/1490486400/1491004800 - Sold for a Neutron Star Wing Mann (10 Keys) + 3 Keys

Sale 4) Sold for a Purple Confetti Crocleather Slouch (13 Keys) + 2 Keys

http://backpack.tf/profiles/76561198186228443#!/compare/1490313600/1490400000

13 + 2 = 15 Keys

http://backpack.tf/item/5283515862

Sale 5) Sold for 14 Keys + ~0.5 Keys of Refined

http://backpack.tf/profiles/76561198049149130#!/compare/1489276800/1489363200

14 + 0.5 = 14.5, which rounds to 15 Keys

Sale 6) Sold for a Blizzardy Storm Reggaelator + ~1.4 Keys of Items/Refined

http://backpack.tf/profiles/76561198240511506#!/compare/1489276800/1489363200

This would probably best be used for the Reggaelator, since its Classified Sellers warrant a drop for it.

Sale 7) Sold + 5 Keys for an Orbiting Fire Tyrant's Helm (24.5 Keys)

http://backpack.tf/profiles/76561198152858022#!/compare/1489881600/1489968000 - Seller's Backpack

http://backpack.tf/profiles/76561198117542709#!/compare/1489881600/1489968000 - Buyer's Backpack

http://www.tf2outpost.com/trade/28835279 - Capped by the Buyout of 17 Keys

Sale 8) Sold for a Circling Heart Pugilist Protector (12 - 13 Keys)

http://backpack.tf/profiles/76561198117542709#!/compare/1489968000/1490054400

Low Outlier.

Pugilist Mini

http://backpack.tf/suggestion/5907a951c44045143a10e5a3 - Either 12 or 13 Keys

Sale 9) Sold for 15 Keys

http://backpack.tf/profiles/76561198159350625#!/compare/1491782400/1491868800 - Buyer's Backpack

I checked all of the histories. One of the last 6 didn't match.

Sale 10) Sold for a Duped Terror-Watt Rimmed Raincatcher

http://backpack.tf/profiles/76561198159350625#!/compare/1491782400/1491868800

This would probably also be better used to price the Rimmed, since its Classified Sellers also warrant a drop for it.