Hopefully this is the last suggestion, Rounded the low end.

Mini's Below.

Sale #1 (2nd most recent sale)

http://i.imgur.com/JFkV3AI.png

Sold for Hellfire Larrikin (42) + Molten Mallard Casemaker (40) + Knifestorm Modest (224) + Death at Dusk Vintage Tyrolean (81)

42 + 40 + 224 + 81 = 387 *0.9 = 348.3 Keys (Rounded to 348) (Buyout was 30 buds and it was paid, so 285 keys)

Before: https://backpack.tf/profiles/76561198012827083?time=1427180400

After: https://backpack.tf/profiles/76561198012827083?time=1427266800

Sale #2

http://gyazo.com/a3775ea9472472a4c535bd71efa16c7d

http://gyazo.com/5c5c4f0c768ff9a24e64d458a5791e87

Stormy Storm Stout Shako (12.5) + Sunbeams Panama (56) + $300 USD Paypal (200 Keys) + Sweets

12.5 + 56 = 68.5 *0.9 = 61.65 (rounded to 62) + 200 = 262 Keys

Before: https://backpack.tf/profiles/76561198056893301?time=1424937600

After: https://backpack.tf/profiles/76561198056893301?time=1425024000

Sale# 3 (Outlier)

http://i.imgur.com/beFsVDX.png

Quicksold for Knifestorm Modest + 3 Earbuds (24) + 16 Keys

224 *0.9 = 201.6 (Rounded to 202 + 40 = 242

Before: https://backpack.tf/profiles/76561198012827083?time=1427439600

After: https://backpack.tf/profiles/76561198012827083?time=1427526000

Sale #4 (Most Recent Sale)

http://oi62.tinypic.com/1427hgi.jpg

Searing Plasma Team Captain (250) + Blizzardy Storm Villains Veil (51) + Earbud (8) + Sweets

250 + 51 = 301 *0.9 = 270.9 (Rounded to 271) + 8 = 279

Before: http://backpack.tf/profiles/76561198064443270?time=1427439600

After: http://backpack.tf/profiles/76561198064443270?time=1427785200

Mini's

Hellfire Larrikin (42 Keys)

Sold for $75 USD Paypal.

42 Keys valuing keys @ $1.75

http://i.imgur.com/N5IYMQ6.png

http://i.imgur.com/qL2ykli.png

Death at Dusk Vintage Tyrolean (81 Keys)

Sold for Arcana Slick Cut (55 Keys) + Australium Medigun (26 Keys)

http://i.imgur.com/F1achtb.png

Arcana Slick Cut (55)

Sold for 5 buds (50) + 5 Keys

http://i.imgur.com/64xcEos.png

Blizzardy Storm Villains Veil (51)

http://backpack.tf/vote/id/551b3460b88d881f268b45d8