Demand is falling

Sellers

http://backpack.tf/classifieds/search/deadliest (1 in classified for 1 key)

http://www.tf2outpost.com/trade/9258180 (1 key)

http://www.tf2outpost.com/trade/9188766 (1.5 keys)

http://www.tf2outpost.com/trade/9188218 (1.5 keys)

http://www.tf2outpost.com/trade/9009380 (1.5 keys)

http://www.tf2outpost.com/trade/8945337 (1.5 keys, One buyer, but retracted)

http://www.tf2outpost.com/trade/8859572 (1.5 keys)

http://www.tf2outpost.com/trade/9188766 (1.5 keys)

Buyers

http://www.tf2outpost.com/trade/9247177 (offered 1 key)

http://www.tf2outpost.com/trade/9045203 (offered 4.33 refs)

http://www.tf2outpost.com/trade/8713298 (offered 1 key)

http://www.tf2outpost.com/trade/8713298 (offered 1 key)

Steam market price has also plummeted.

http://steamcommunity.com/market/listings/440/Genuine%20Deadliest%20Duckling

Lots of sellers from $2.20 - $3

1.5 key trades are days and weeks old.

I've seen successful buyers for 1 key in the past weeks. if there was just a way to view finished trades on outpost.

I was too busy finding evidence. Forgot to change the default currency :p