Solds:

1) http://www.tf2outpost.com/trade/21513262 - Sold for orb. fire Prussian Pickelhaube (0.9 * 1.1 = 0.99 buds)

2) http://www.tf2outpost.com/trade/22109131 - Sold for http://www.tf2outpost.com/trade/22109131 (0.9 * 20 = 18 keys) <- http://www.tf2outpost.com/trade/20586799 and http://www.tf2outpost.com/trade/21607121 are selling topi for 1 bud / 1 bud 1 key so I'll count it's price as 20 keys

3) http://www.tf2outpost.com/trade/21200226 - sold for blizzardi storm hot dogger and 4 keys in sweets ( (18.5 +4)*0.9 = 20.25 )

4) http://www.tf2outpost.com/trade/21833239 - sold for steaming tricone (13 keys) + s.f pro killstreak force a nature (7 keys) (20*0.9= 18 keys)

Range: 18 - 20 keys