Resuggest...

Sold at 20 keys

http://www.tf2outpost.com/trade/26788464 - sold for 20 keys

http://backpack.tf/profiles/76561198112583486?time=1439708400 - before? looks like he sold the ref for keys in between these histories

http://backpack.tf/profiles/76561198112583486?time=1439794800 - after

Sold for an O'Clocked Pom Pom, credit to Merndy

http://www.tf2outpost.com/trade/26613539 B/O of 22 keys.

Sold for an Overclocked Pom-Pommed Provocateur

http://backpack.tf/profiles/76561198117502456?time=1438412400 (August 1st)

http://backpack.tf/profiles/76561198117502456?time=1438498800 (August 2nd)

http://backpack.tf/profiles/76561198117502456?time=1438412400&compare=1438498800

"It's duped so I'll try something.

http://backpack.tf/item/1947188479 found a sale for a duped http://backpack.tf/item/1819403778

It easily exceeds 22 keys so I'll resuggest at that."