Right?

Sale #1:

Sold with ~2.5 keys sweets for a Searing Pickelhaube (29)

29 * 0.9 - 2.5 = 23.6 keys rounding to 24 keys

http://backpack.tf/profiles/76561198074192315?time=1431643518

http://backpack.tf/profiles/76561198074192315?time=1431759600

Sale #2:

Sold for 12 keys

Low, not including in range

http://backpack.tf/profiles/76561198106656127?time=1428390000

http://backpack.tf/profiles/76561198106656127?time=1428735600

Sale #3:

Sold for 23 keys

http://backpack.tf/profiles/76561198089781725?time=1429945200

http://backpack.tf/profiles/76561198089781725?time=1430031600

Sale #4:

Sold 1:1 for a Miami Sack (16)

16 * 0.9 = 14.4 keys rounding to 14 keys

http://backpack.tf/profiles/76561198170054331?time=1430436136

http://backpack.tf/profiles/76561198170054331?time=1430463600

Sale #5:

Sold with ~2 keys sweets for a Miami Casemaker (29)

29 * 0.9 - 2 = 24.1 keys rounding to 24 keys

http://backpack.tf/profiles/76561198072217795?time=1431661781

http://backpack.tf/profiles/76561198072217795?time=1431759600

Sale #6:

Sold 1:1 for a GC Valley Forge (16)

16 * 0.9 = 14.4 keys rounding to 14 keys

http://backpack.tf/profiles/76561198021272428?time=1428348093

http://backpack.tf/profiles/76561198021272428?time=1428390000

Sack mini:

Sold for ~16 keys

http://backpack.tf/profiles/76561198080312295?time=1428896480

http://backpack.tf/profiles/76561198080312295?time=1428908400