Proof 1:

knifestorm Tyrant + Spellbound Regga + planets tavish degroot + strange professional killstreak desciplinary action + bills

8.5+ 11.77+ 0.75 + [4 key + 3 key] 0.6 = 21.62 * 0.9 = 19.458 Buds

http://i.imgur.com/8Jktbkv.jpg

Proof 2:

Sunbeams Anger + Lvl1 Max

15+3=18*0.9=16.2

http://www.tf2outpost.com/trade/23994136

Note from previous Suggestion:

First two issues are minor. Degroot is a 1 buds hat. It being outdated won't have any effect on a 20 buds hat. Disc action is close enough. Degroot is probably undervalued by 0.1-0.2 buds and tyrants / reggae overvalued by 0.1-0.2 buds. All in all, that first sale should have just been rounded to 19.5.

Second sale shouldn't have any overpay since it was offered. Mini on anger

http://backpack.tf/profiles/76561198062289564?time=1417766400 - max + small sweets for scorching anger ~15 after overpay

http://backpack.tf/profiles/76561198035077222?time=1416211200 - another sale here at ~15 after overpay

So sale 1 = ~19.5

Sale 2 = ~18