http://www.tf2outpost.com/trade/5107507 - Latest pure offer is ts + white bills 1 month ago.

http://www.tf2outpost.com/trade/8122592 - tent. b. bills + s. caber ~21 keys in items

http://www.tf2outpost.com/trade/8194430 - payed 1 bud + this for bubbles little buddy (super overpay omg)

http://www.tf2outpost.com/trade/8413722 - b/o 20 keys, looks like it sold for 18-20.

http://www.tf2outpost.com/trade/8528985 - b/o 21 key unusual

http://www.tf2outpost.com/trade/8058482 - b/o 21 keys, sold to a collector.

http://www.tf2outpost.com/trade/8024218 - the next owner offered sf hunts + g. anger 3 weeks ago. Did he add sweets?

This is right around 20 keys