Took me a month to collect proof for this. :x All proof presented is for clean HOUWARs unless otherwise stated.

Sales:

http://www.tf2outpost.com/trade/25111161 30 buds ~150 keys taking buds at 5 keys each (a month ago, took 1 month)

http://www.tf2outpost.com/trade/25800798 130 keys (a few days ago, took 2 weeks)

http://www.tf2outpost.com/trade/25588930 Cash most likely

Non-Pure Sales:

http://www.tf2outpost.com/trade/25659905 Morning Glory Muffs

http://www.tf2outpost.com/trade/25817655 Mallard Law

http://www.tf2outpost.com/trade/25817837 Beams Bomber's Bucket Hat (not clear)

http://www.tf2outpost.com/trade/25897965 Duped HOUWAR + 5 keys

Sellers:

http://www.tf2outpost.com/trade/25921153 120 keys

http://www.tf2outpost.com/trade/25917967 130 keys

http://www.tf2outpost.com/trade/25821763 140 keys

http://www.tf2outpost.com/trade/25963896 144 keys

http://www.tf2outpost.com/trade/23095090 140-150 keys

http://www.tf2outpost.com/trade/25661100 130 CS:GO Keys

Offers:

http://www.tf2outpost.com/trade/25661100 120 CS:GO keys

http://www.tf2outpost.com/trade/25817655 Claims to have been offered 140 keys, but no visible proof for it :/

http://www.tf2outpost.com/trade/25588930 100 keys + Max Head for duped, 110 keys for duped