Sale 1:

Sold for Miami Nights Gilded Guard (Mini at 23 below) + Minor sweets

No outpost

Seller: http://backpack.tf/profiles/76561198177154519#!/compare/1475539200/1475625600

Buyer: http://backpack.tf/profiles/76561198127579878#!/compare/1475539200/1475625600

X = 23

Sale 2:

Sold for 23 keys

http://www.tf2outpost.com/trade/28455752 - B/O of 23, seller confirms sale (legend)

Seller: http://backpack.tf/profiles/76561198055617854#!/compare/1472601600/1472688000

Buyer: http://backpack.tf/profiles/76561198291306675#!/compare/1472601600/1472688000

X = 23

Sale 3:

Sold for 22 keys

http://www.tf2outpost.com/trade/28489303 - B/O of 25

Seller: http://backpack.tf/profiles/76561198053675922#!/compare/1474070400/1474156800

Buyer: http://backpack.tf/profiles/76561198111102286#!/compare/1474070400/1474156800

X = 22

Sale 4:

Quicksold for 21 keys

No outpost

Seller: http://backpack.tf/profiles/76561198112287629#!/compare/1472947200/1473033600

Buyer: http://backpack.tf/profiles/76561198058460770#!/compare/1472947200/1473033600

X = 21

Sale 5:

Sold with ~1 key in items for Atomic Head Full of Hot Air (21)

http://www.tf2outpost.com/trade/28519199 - B/O of 26

Seller: http://backpack.tf/profiles/76561198174768386#!/compare/1475452800/1475539200

Buyer: http://backpack.tf/profiles/76561198177154519#!/compare/1475452800/1475539200

X = 20

Sale 6:

Quicksold for 20 keys

http://www.tf2outpost.com/trade/28464193 - B/O of 25

Seller: http://backpack.tf/profiles/76561198219212248#!/compare/1472860800/1472947200

Buyer: http://backpack.tf/profiles/76561198112287629#!/compare/1472860800/1472947200

X = 20

Sale 7:

Sold for 20 keys (according to buyer’s compare link)

http://www.tf2outpost.com/trade/28479922 - B/O of 26, buyer offers here

Seller: http://backpack.tf/profiles/76561198121660651#!/compare/1473724800/1473811200

Buyer: http://backpack.tf/profiles/76561198053675922#!/compare/1473638400/1473811200

X = 20

Sale 8:

Sold with 6 keys for DBD Noir

Seller: http://backpack.tf/profiles/76561198058460770#!/compare/1473292800/1473379200

Buyer: http://backpack.tf/profiles/76561198121660651#!/compare/1473292800/1473379200

Should be used to update the Noir

Miami Nights Gilded Guard:

Sold for 23 keys

http://www.tf2outpost.com/trade/28591718 - No B/O

Seller: http://backpack.tf/profiles/76561197979613476#!/compare/1478476800/1478563200

Buyer: http://backpack.tf/profiles/76561198031768881#!/compare/1478563200/1478736000

X = 23

Sellers:

24 keys:

http://www.tf2outpost.com/trade/28602289

http://backpack.tf/u/76561198018148265

26 keys:

http://i.imgur.com/mfcgVm8.png

http://backpack.tf/u/76561198125791160

http://i.imgur.com/UV7x8zh.png

http://backpack.tf/u/76561198115842508

30 keys:

http://i.imgur.com/bA4B6Bk.png

http://backpack.tf/u/76561198119563409

Selling as a set:

http://www.tf2outpost.com/trade/28535571

http://backpack.tf/u/76561198096619846

Sales at:

23 (2x)

22

21

20 (3x)

Some of the lower sales were quicksales, however, they are far too common to ignore.

Going with 20-23