4 months old

http://www.tf2outpost.com/trade/13472444

-17 keys

-SF Knife (20 keys)

http://www.tf2outpost.com/trade/13469643

buyout: 14 keys (presumably sold for that)

http://www.tf2outpost.com/trade/13339807

SOLD: 14-15 keys

http://www.tf2outpost.com/trade/13343089 -Planets Buckaroos Hat

http://www.tf2outpost.com/trade/13385989 -2 keys

note: I am counting the Buckaroos at 13 keys because of many offers and sold trades from last suggestion. However, I will still use the overpay rule, in which I get a 14 key sale.

http://www.tf2outpost.com/trade/13021272

SOLD: presumably $35 on community market (about 14-16 keys or so)

-17 keys

-18 keys