Sale 1:

Sold for 20 keys

http://www.tf2outpost.com/trade/28662975 - B/O of 20

Seller: http://backpack.tf/profiles/76561198046167937#!/compare/1481414400/1482019200

Buyer: http://backpack.tf/profiles/76561198133497032#!/compare/1478908800/1482019200

X = 20

Sale 2:

Quicksold for 17 keys + cheap paint

No outpost

Seller: http://backpack.tf/profiles/76561198237492194#!/compare/1485388800/1485475200

Buyer: http://backpack.tf/profiles/76561198033910126#!/compare/1485475200/1485561600

X = 17

Sale 3:

Sold for 17 keys in ~10 days

http://www.tf2outpost.com/trade/28634968 - B/O of 17

Seller: http://backpack.tf/profiles/76561198175665245#!/compare/1480982400/1481241600

Buyer: http://backpack.tf/profiles/76561198255756675#!/compare/1480896000/1481241600

X = 17

Sale 4:

Sold for 16 keys

Seller: http://backpack.tf/profiles/76561198240537922#!/compare/1484611200/1484784000

Buyer: http://backpack.tf/profiles/76561198192232255#!/compare/1484092800/1484784000

X = 16

Sale 5:

Sold for 16 keys + cheap skin

Seller: http://backpack.tf/profiles/76561198077934494#!/compare/1482796800/1482883200

Buyer: http://backpack.tf/profiles/76561198124031594#!/compare/1482796800/1482883200

X = 16

Sale 6:

Sold for 16 keys

http://www.tf2outpost.com/trade/28707082 - No visible B/O

Seller: http://backpack.tf/profiles/76561198243530442#!/compare/1484956800/1485043200

Buyer: http://backpack.tf/profiles/76561198069915123#!/compare/1484956800/1485043200

X = 16

Sale 7:

Quicksold for 15 keys + cheap hats

Seller: http://backpack.tf/profiles/76561198236824046#!/compare/1483315200/1483401600

Buyer: http://backpack.tf/profiles/76561198313935698#!/compare/1483315200/1483401600

X = 15

Sale 8:

Sold for Blizzardy Storm Hustler’s Hallmark + >0.5 keys in items

Seller: http://backpack.tf/profiles/76561198068294212#!/compare/1481673600/1481760000

Buyer: http://backpack.tf/profiles/76561198116897525#!/compare/1481673600/1481760000

Should fall into the range here.

Sale 9:

Sold for Searing Plasma Scotch Bonnet

Seller: http://backpack.tf/profiles/76561198124031594#!/compare/1483228800/1483401600

Buyer: http://backpack.tf/profiles/76561198146981377#!/compare/1483056000/1483401600

Might be better to update the Scotch with this sale.

Sale 10: (Dupe)

Sold for Starstorm Slumber Wing Mann + Strange Fast Learner (4)

Seller: http://backpack.tf/profiles/76561198002186909#!/compare/1479168000/1479254400

Buyer: http://backpack.tf/profiles/76561198210454772#!/compare/1479168000/1479254400

Wing Mann is in-date at 18, but has multiple sellers at 14. With that in mind, this sale should fit in the range.

Sale 11:

Sold with 8 keys + <0.5 keys in items for Aces High Attendant

Seller: http://backpack.tf/profiles/76561198196503877#!/compare/1481414400/1482192000

Buyer: http://backpack.tf/profiles/76561198046167937#!/compare/1479859200/1481414400

Should be used on the Attendant.

Sale 12:

Sold with 11 keys for Green Confetti Master’s Yellow Belt

Seller: http://backpack.tf/profiles/76561198313935698#!/compare/1483401600/1483488000

Buyer: http://backpack.tf/profiles/76561198240537922#!/compare/1483315200/1483488000

Should be used to update the belt

Sale 13:

Sold for Vivid Plasma Nanobalaclava

http://www.tf2outpost.com/trade/28652211 - B/O of 20

Seller: http://backpack.tf/profiles/76561198075787872#!/compare/1481328000/1481587200

Buyer: http://backpack.tf/profiles/76561198200270154#!/compare/1481500800/1481587200

Might be better to update the Nano with this sale.

Sale 14:

Sold with 3 keys for Memory Leak Pyro’s Boron Beanie

Seller: http://backpack.tf/profiles/76561198200270154#!/compare/1481673600/1481760000

Buyer: http://backpack.tf/profiles/76561198310750043#!/compare/1481673600/1481760000

Would definitely be better to update the Beanie with this sale.

Sale 15:

Sold for Cloud 9 Big Elfin Deal + 3 keys + Strange parted Blood Botkiller Flamethrower (~1)

http://www.tf2outpost.com/trade/28734984 - B/O of 18

Seller: http://backpack.tf/profiles/76561198069915123#!/compare/1485043200/1485129600

Buyer: http://backpack.tf/profiles/76561198043028890#!/compare/1484956800/1485129600

Should fall into the range, and possibly cap at the B/O even.

Sales at:

15

16 (3x)

17 (2x)

20

Some of the sales don’t have their outpost trades linked, because half of this suggestion was done while outpost was down for maintenance. One of the past owners tried selling their guad for 20 keys for ~3-4 months, which I’ll include once outpost comes back from maintenance (If I’m awake at the time). This’ll prove any sales higher than 20 to be outliers. http://www.tf2outpost.com/trade/28399751

I chose not to exclude 20 as it is a pure sale, and some of the sales without exact values are likely to end up being close to the high-end.

No current sellers on the classifieds (can’t check outpost at the moment, as it is under maintenance)

17 quicksold once, but took several days on the other occasion, and there are multiple sales for 16, so no need to exclude 17 and 16.

15 quicksold, and has a buyer on the classifieds for 15. Excluding 15.

http://i.imgur.com/lsJL2YR.png

http://backpack.tf/u/76561198243530442

Going with 16-20.