Sells

http://www.tf2outpost.com/trade/9437203 - Sold for 15 keys + 23 ref. The ref (adjusted for inflation) is just over 5 additional keys (key prices were about 4.33 ref at that time). Total trade value of 20 keys.

Offers

http://www.tf2outpost.com/trade/9814958 - Offered 17 pure, 18-19 keys, Steaming Tippler's Tricorne (16-18 keys), had a few item offers with low craft numbers, but I didn't include that in this list.

http://www.tf2outpost.com/trade/9400484 - Offered 18 keys

http://www.tf2outpost.com/trade/10265683 - B/O of 24 keys, no offers