Sale 1:

Sold for Terror-Watt Ze Goggles (14.5)

http://www.tf2outpost.com/trade/29195102 - B/O of 14

Seller: https://backpack.tf/profiles/76561198156255538#!/compare/1496448000/1496534400

Buyer: https://backpack.tf/profiles/76561198147243794#!/compare/1496448000/1496534400

X = 14 (Capped by B/O)

Sale 2:

Sold for Purple Confetti Big Elfin Deal (10.5) + Spec. KS C.A.P.P.E.R. (>2)

No outpost

Seller: https://backpack.tf/profiles/76561198095862827#!/compare/1493251200/1493337600

Buyer: https://backpack.tf/profiles/76561198184946878#!/compare/1493251200/1493337600

X = 13

Sale 3:

Quicksold for 11 keys + ~1 key in metal

No outpost

Seller: https://backpack.tf/profiles/76561198119057660#!/compare/1492992000/1493078400

Buyer: https://backpack.tf/profiles/76561198185007761#!/compare/1492992000/1493078400

X = 12

Sale 4:

Sold for Peace Sign Tippler’s Tricorne (Mini at 11 below) + <0.5 keys in items

http://www.tf2outpost.com/trade/28850713 - No B/O

Seller: https://backpack.tf/profiles/76561198024700553#!/compare/1491868800/1491955200

Buyer: https://backpack.tf/profiles/76561198140333188#!/compare/1491523200/1491955200

X = 11

Sale 5:

Quicksold for 10 keys

http://www.tf2outpost.com/trade/28894266 - B/O of 13

Seller: https://backpack.tf/profiles/76561198185007761#!/compare/1492992000/1493078400

Buyer: https://backpack.tf/profiles/76561198201646261#!/compare/1492905600/1493078400

X = 10

Sale 6:

Sold with Vintage Killstreak Lugermorph for Terror-Watt Titanium Pillar

Seller: https://backpack.tf/profiles/76561198140333188#!/compare/1491955200/1492214400

Buyer: https://backpack.tf/profiles/76561198156255538#!/compare/1492128000/1492214400

Should be used on the Pillar. It is (barely) in-date, but could do with a raise in price.

Sale 7:

Bulk for Kill-a-Watt Condor Cap

Seller: https://backpack.tf/profiles/76561198132226518#!/compare/1493251200/1493337600

Buyer: https://backpack.tf/profiles/76561198095862827#!/compare/1493251200/1493337600

Sale 8:

Sold for Stormy Storm Pyro’s Boron Beanie + 1 key

http://www.tf2outpost.com/trade/28899647 - B/O of 14

Seller: https://backpack.tf/profiles/76561198184946878#!/compare/1493337600/1493424000

Buyer: https://backpack.tf/profiles/76561197996904846#!/compare/1493164800/1493424000

Couldn’t get a mini on the Beanie.

Sale 9:

Sold with a key for Tesla Coil Spirit of the Bombing past (13)

No outpost

Seller: https://backpack.tf/profiles/76561197994296450#!/compare/1494547200/1494633600

Buyer: https://backpack.tf/profiles/76561198125791160#!/compare/1494547200/1494633600

Spirit has two sellers at less than its current price, gonna exclude this sale.

Peace Sign Tricorne Mini:

Sold for Stormy Storm Big Elfin Deal (10.5)

http://www.tf2outpost.com/trade/28901117 - No B/O

Seller: https://backpack.tf/profiles/76561198024700553#!/compare/1493424000/1493510400

Buyer: https://backpack.tf/profiles/76561198085833195#!/compare/1493424000/1493510400

X = 11

(This can probably be turned into a full suggestion, if there are any takers)

Sellers:

14 keys:

http://i.imgur.com/22RvD5l.png - 1 month

https://backpack.tf/u/76561198125791160

Sales at:

10

11

12

13

14

Sales at 10 and 12 are quicksales. Excluding 12 and below.

Going with 13-14.