Sale 1:

https://backpack.tf/profiles/76561198116318972#!/compare/1545004800/1545350400

https://backpack.tf/profiles/76561198289372905#!/compare/1544918400/1545004800

Sold with ~4 keys in sweets for Aussie Wrench(32)

Total is 28 keys

Sale 2:

https://backpack.tf/profiles/76561198289372905#!/compare/1545955200/1546560000

https://backpack.tf/profiles/76561198148843171#!/compare/1546473600/1546560000

Sold for 20 keys

Sale 3:

https://backpack.tf/profiles/76561198148843171#!/compare/1546905600/1546992000

https://backpack.tf/profiles/76561198089739855#!/compare/1546905600/1546992000

Sold for 20 keys

Sale 4:

https://backpack.tf/profiles/76561198089739855#!/compare/1547164800/1547251200

https://backpack.tf/profiles/76561198345445105#!/compare/1547164800/1547251200

Sold for Planets BoA

BoA Mini:

https://backpack.tf/suggestion/5c67d1dbcf6c757f810a972c

Suggestion for 27.5 keys

Sale 5:

https://backpack.tf/profiles/76561198345445105#!/compare/1547596800/1547683200

https://backpack.tf/profiles/76561198024867201#!/compare/1547596800/1547683200

Sold with ~2 keys in sweets for Miami Pampered

Pampered Mini:

https://backpack.tf/suggestion/5c6b13a644325a4db44da671

Suggestion for 13.5 keys

Total is 11.5 keys

Sale 6:

https://backpack.tf/profiles/76561198024867201#!/compare/1549756800/1549843200

https://backpack.tf/profiles/76561198819844764#!/compare/1549843200/1550188800

Sold for 34 keys

Sale 7:

https://backpack.tf/profiles/76561198052196602#!/compare/1544486400/1544572800

https://backpack.tf/profiles/76561198164988232#!/compare/1512518400/1545782400

Sold for SCM

Sale 8:

https://backpack.tf/profiles/76561198164988232#!/compare/1545782400/1546300800

https://backpack.tf/profiles/76561198040922869#!/compare/1546214400/1546300800

QS?

Sale 9:

https://backpack.tf/profiles/76561198040922869#!/compare/1548201600/1548288000

https://backpack.tf/profiles/76561198343428818#!/compare/1548115200/1548288000

Sold for HG Polar(15.5) + 72 Sorcery + ~1 key in sweets

Sorcery Mini:

https://backpack.tf/suggestion/5c6863fb44325a4e0e0ab015

Suggestion for 5.5 keys

Total is 22 keys

Sale 10:

https://backpack.tf/profiles/76561198343428818#!/compare/1548374400/1548979200

https://backpack.tf/profiles/76561198089298088#!/compare/1548892800/1548979200

Sold for Blizzardy Hedge + SGG Disco + 8 keys + Spell

Hedge Mini:

https://backpack.tf/suggestion/5c68cb3d44325a247a68625f

Suggestion for 12 keys

Disco Mini:

https://backpack.tf/suggestion/5c6b0f5144325a49be7435b6

Suggestion for 4 keys

Spell Mini:

https://backpack.tf/classifieds?page=6&item=Old%20Guadalajara&quality=6&tradable=1&craftable=1&australium=-1&killstreak_tier=0

No usable sales, taking seller for 2 keys

Total is 26 keys

Sale 11:

https://backpack.tf/profiles/76561198089298088#!/compare/1548979200/1549065600

https://backpack.tf/profiles/76561198226262240#!/compare/1548979200/1549065600

Bulky

Total sales @:

11.5, 20, 20, 22, 26, 27.5, 28, 34 keys

Seller at 34 keys

Buyers up to 8 keys,

11.5 is a clear outlier,

Taking 20 - 34 keys