Needs a drop

Sale 1

http://backpack.tf/profiles/76561198088817914#!/compare/1495238400/1495497600

With Professional Killstreak Beggar's Bazooka (1.5 key) for Cauldron Big Country (no recent sales, none on market, no minis)

Better use on Country.

Sale 2

http://backpack.tf/profiles/76561198088817914#!/compare/1493424000/1493510400

For duped Phosphorous Broadband Bonnet (suggestion was made on duped sale, taking ~21)

X = 20.5 rounding to 20

Sale 3

http://backpack.tf/profiles/76561198060230038#!/compare/1489881600/1490140800

With 1 key for TF logo Airdog (month @20: http://screenshot.sh/m19BxzVdg6eBp )

X = 19

Sale 4

Sold for a Max's head, when they were 19 keys:

Seller: https://backpack.tf/profiles/76561198080179568#!/compare/1492646400/1492732800

Buyer: https://backpack.tf/profiles/76561198131687266#!/compare/1492128000/1492905600

Creds to Jarool

Summary:

Sales @ 19, 20

http://screenshot.sh/ofpDZbuF58V5Z - 10 and 19 days unsolds @19

Taking 19, excluding 20 from range