Sale 1:

https://backpack.tf/profiles/76561198117856406#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198337734785#!/compare/1546300800/1546387200

QS

Sale 2:

https://backpack.tf/profiles/76561198337734785#!/compare/1546473600/1546560000

https://backpack.tf/profiles/76561198218375863#!/compare/1546473600/1546560000

Sold for 13 keys

Sale 3:

https://backpack.tf/profiles/76561198218375863#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198230109280#!/compare/1547078400/1547164800

Sold for ~12 keys

Sale 4:

https://backpack.tf/profiles/76561198230109280#!/compare/1547164800/1547251200

https://backpack.tf/profiles/76561198208327832#!/compare/1547164800/1547251200

Sold for ~13 keys

Sale 5:

https://backpack.tf/profiles/76561198208327832#!/compare/1548028800/1548115200

https://backpack.tf/profiles/76561198024867201#!/compare/1548374400/1548460800

QS?

Sale 6:

https://backpack.tf/profiles/76561198436693500#!/compare/1547683200/1548115200

https://backpack.tf/profiles/76561198050518375#!/compare/1548028800/1548115200

QS?

Sale 7:

https://backpack.tf/profiles/76561198050518375#!/compare/1548547200/1548633600

https://backpack.tf/profiles/76561198337734785#!/compare/1548547200/1548633600

QS

Sale 8:

https://backpack.tf/profiles/76561198337734785#!/compare/1549324800/1549411200

https://backpack.tf/profiles/76561198280152594#!/compare/1549324800/1549411200

Keys

Sale 9:

https://backpack.tf/profiles/76561198802184359#!/compare/1548460800/1548547200

https://backpack.tf/profiles/76561198074019286#!/compare/1548460800/1548892800

Sold for 6 keys + Aussie SMG(6)

Total is 12 keys

Sale 10:

https://backpack.tf/profiles/76561198074019286#!/compare/1550275200/1550534400

https://backpack.tf/profiles/76561198039126745#!/compare/1550275200/1550448000

Sold for Smoking Swatter + 5 keys

Swatter Mini:

https://backpack.tf/suggestion/5c7a4eefd3817255b10cf681

Suggestion for 11 keys

Total is 16 keys

Sale 11:

https://backpack.tf/profiles/76561198014728963#!/compare/1547164800/1547251200

https://backpack.tf/profiles/76561198351650980#!/compare/1546646400/1548806400

SCM?

Sale 12:

https://backpack.tf/profiles/76561198422369335#!/compare/1546732800/1546819200

https://backpack.tf/profiles/76561198283095379#!/compare/1546732800/1546819200

Untrace

Sale 13:

https://backpack.tf/profiles/76561198283095379#!/compare/1547424000/1547510400

https://backpack.tf/profiles/76561198291789666#!/compare/1547424000/1547510400

Keys

Sale 14:

https://backpack.tf/profiles/76561198291789666#!/compare/1549411200/1549843200

https://backpack.tf/profiles/76561198337734785#!/compare/1549584000/1549843200

QS

Sale 15:

https://backpack.tf/profiles/76561198337734785#!/compare/1550102400/1550188800

https://backpack.tf/profiles/76561198209765705#!/compare/1550016000/1550188800

Untrace

Sale 16:

https://backpack.tf/profiles/76561198089838489#!/compare/1548028800/1548115200

https://backpack.tf/profiles/76561198243211546#!/compare/1547942400/1548028800

Sold for ~13 keys

Sale 17:

https://backpack.tf/profiles/76561198209640976#!/compare/1548633600/1548806400

https://backpack.tf/profiles/76561198243211546#!/compare/1548633600/1548806400

Sold with 1 key for HG Fr-0

Sale 18:

https://backpack.tf/profiles/76561198209640976#!/compare/1548806400/1548892800

https://backpack.tf/profiles/76561198020054731#!/compare/1547856000/1548892800

Sold for 12 keys

Sale 19:

https://backpack.tf/profiles/76561198020054731#!/compare/1549238400/1549843200

https://backpack.tf/profiles/76561198079906166#!/compare/1548115200/1549756800

Sold for 13 keys

Sale 20:

https://backpack.tf/profiles/76561198448829129#!/compare/1547769600/1547942400

https://backpack.tf/profiles/76561198802184359#!/compare/1547856000/1547942400

Traceable ~8 keys, probably sold for more

Sale 21:

https://backpack.tf/profiles/76561198802184359#!/compare/1547856000/1547942400

https://backpack.tf/profiles/76561198091157081#!/compare/1547769600/1547942400

Sold with ~2 keys in sweets for C9 Bonnet

Bonnet Mini:

https://backpack.tf/suggestion/5c78fbcc6780725ce0721008

Suggestion for 16.5 keys

Total is 14.5 keys

Sale 22:

https://backpack.tf/profiles/76561198091157081#!/compare/1548028800/1548115200

https://backpack.tf/profiles/76561198061108999#!/compare/1548028800/1548115200

Sold with 1 key for C9 Pirate

Use there

Sale 23:

https://backpack.tf/profiles/76561198061108999#!/compare/1549411200/1549497600

https://backpack.tf/profiles/76561198368744547#!/compare/1549238400/1549497600

Sold for Aces Swatter + ~2 keys in sweets

Swatter Mini:

https://backpack.tf/suggestion/5c79a3fa678072689a1346de

Suggestion for 11 keys

Total is 13 keys

Sale 24:

https://marketplace.tf/items/344;5;u29

$26.00 / $1.78 = 14.61 keys

$31.40 / $1.79 = 17.54 keys

Total sales @:

12, 12, 12, 13, 13, 13, 13, 13, 14.5, 14.61, 16, 17.54 keys

Sellers down to 14 keys,

Buyers up to 12 keys,

Taking 13 flat.