Over a year old price

Sold for Bills + 7 keys = 13 keys, took 2 days

http://www.tf2outpost.com/trade/22409499

http://backpack.tf/profiles/76561197993834391?time=1409814000

Sold for 14 key B/O, took 3 weeks

http://www.tf2outpost.com/trade/22266399

http://www.tf2outpost.com/trade/21214777 (New owner offered 14 keys here)

http://backpack.tf/profiles/76561198053118469?time=1410505200 (Has 4 keys and Bucket)

http://backpack.tf/profiles/76561198053118469?time=1410764400 (Has 1 key and a new bud and since buds are going for 17 keys right now the math works out in this case)

Sold for Professional S. Huntsman ~11 keys based on SCM sales consistently around $30 CAD

http://www.tf2outpost.com/trade/21791772

http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Huntsman

Sold for Nuts and Bolts Tavish Degroot Experience (~12 keys but slightly outdated)

http://www.tf2outpost.com/trade/22607413

http://backpack.tf/profiles/76561198073252250?time=1410591600

Sellers:

http://www.tf2outpost.com/trade/22462801 14.5 keys, 1 week, rejected 12 keys

http://www.tf2outpost.com/trade/22553704 14 keys, 1 weeks

http://www.tf2outpost.com/trade/21214777 17 keys, 2 months

That red arrow confuses me...