Sale 1:

Sold With Pro. KS Backburner kit (4) for Flies Trucker’s Topper (Mini at 15 below)

http://www.tf2outpost.com/trade/29494721 - B/O of 17

Seller: https://backpack.tf/profiles/76561197984366267#!/compare/1515283200/1515369600

Buyer: https://backpack.tf/profiles/76561198185533193#!/compare/1515369600/1517097600

X = 11

Sale 2:

Sold for 10 keys + 1 ref to a bot

Seller: https://backpack.tf/profiles/76561198148446278#!/compare/1483315200/1514937600

Buyer: https://backpack.tf/profiles/76561198344933095#!/compare/1514851200/1514937600

X = 10

Sale 3:

Bulk for Showstopper RPS?

Seller: https://backpack.tf/profiles/76561198090460161#!/compare/1515715200/1515801600

Buyer: https://backpack.tf/profiles/76561198061489334#!/compare/1515715200/1515801600

The above sales are all within the last month. I’m not comfortable using only these sales, so I’ve included a sale older than a month:

Sale 4:

Sold for 17 EOTL Keys (~11.5 at the time) + cheap items

Seller: https://backpack.tf/profiles/76561198068587455#!/compare/1512691200/1512777600

Buyer: https://backpack.tf/profiles/76561198275393917#!/compare/1512604800/1512777600

X = 12

Flies Trucker’s Topper Mini:

Sale 1:

Sold for $38.90 on the SCM

http://steamcommunity.com/market/listings/440/Unusual%20Trucker%27s%20Topper

https://backpack.tf/profiles/76561198085852627#!/compare/1516060800/1516147200

https://backpack.tf/item/6554369766

https://i.imgur.com/jW0HhUQ.png

Only other sales around that time were $17.87 (buyers price, would’ve sold immediately after listing) and $174.17, which is guaranteed to NOT be the massed flies one.

38.90/2.46 = ~15.8

X = 16

Sale 2:

Sold for 14 keys

Seller: https://backpack.tf/profiles/76561198090419068#!/compare/1514851200/1514937600

Buyer: https://backpack.tf/profiles/76561198028943046#!/compare/1514764800/1514937600

X = 14

Taking 15.

Sellers:

https://i.imgur.com/TSLFgkh.png

13 keys:

https://backpack.tf/item/2949281244

https://backpack.tf/item/3306053740

https://backpack.tf/item/2856769199

14 keys:

https://backpack.tf/item/2768435685

https://backpack.tf/item/2688029011

20 keys:

https://backpack.tf/item/6454963630

Sales at:

10

11

12

10 sold to a bot, excluding 10.

Going with 11-12.