Sale 1:

https://backpack.tf/profiles/76561198326105377#!/compare/1564617600/1569110400

https://backpack.tf/profiles/76561198204138151#!/compare/1562457600/1565308800

SCM

Sale 2:

https://backpack.tf/profiles/76561198068612596#!/compare/1565827200/1566000000

https://backpack.tf/profiles/76561198341171690#!/compare/1565913600/1566000000

Sold for ~7 keys

Sale 3:

https://backpack.tf/profiles/76561198341171690#!/compare/1566518400/1566604800

https://backpack.tf/profiles/76561198328467289#!/compare/1566518400/1566604800

Untrace

Sale 4:

https://backpack.tf/profiles/76561197996972843#!/compare/1562544000/1562630400

https://backpack.tf/profiles/76561198280573588#!/compare/1562544000/1562630400

Bulky for spells

Sale 5:

https://backpack.tf/profiles/76561198280573588#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198418636685#!/compare/1562889600/1562976000

Sold with ~3.5 keys in sweets for Rockets Zoomin + ~14 keys in sweets

Zoomin Mini:

https://backpack.tf/suggestion/5d895ddc678072460a6bcbd2

Suggestion for 8 keys

Total is ~18 keys

Sale 6:

https://backpack.tf/profiles/76561198418636685#!/compare/1564704000/1567036800

https://backpack.tf/profiles/76561198137326742#!/compare/1566864000/1566950400

Untrace

sale 7:

https://backpack.tf/profiles/76561198137326742#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198842088544#!/compare/1567123200/1567209600

Untrace

Sale 8:

https://backpack.tf/profiles/76561198042804225#!/compare/1564272000/1566691200

https://backpack.tf/profiles/76561198334598690#!/compare/1564272000/1564358400

QS

sale 9:

https://backpack.tf/profiles/76561198334598690#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198403646160#!/compare/1566172800/1566259200

Untrace

sale 10:

https://backpack.tf/profiles/76561198403646160#!/compare/1566259200/1566345600

https://backpack.tf/profiles/76561198368964060#!/compare/1566172800/1566345600

Untrace

sale 11:

https://backpack.tf/profiles/76561198368964060#!/compare/1566345600/1566432000

https://backpack.tf/profiles/76561198068460782#!/compare/1566345600/1566432000

Sold with 3 keys for Bubbling Mirror(8.5)

Total is 5.5 keys

Sale 12:

https://backpack.tf/profiles/76561198068460782#!/compare/1566345600/1566432000

https://backpack.tf/profiles/76561198061257432#!/compare/1566345600/1566432000

Untrace

Sale 13:

https://backpack.tf/profiles/76561198061257432#!/compare/1566518400/1566604800

https://backpack.tf/profiles/76561198252999692#!/compare/1566518400/1566604800

Bulk

sale 14:

https://backpack.tf/profiles/76561198252999692#!/compare/1566604800/1566691200

https://backpack.tf/profiles/76561198124082713#!/compare/1566518400/1566604800

Keys...

Sale 15:

https://backpack.tf/profiles/76561198124082713#!/compare/1566604800/1566691200

https://backpack.tf/profiles/76561198354174814#!/compare/1566604800/1566691200

Sold with ~4 keys in sweets for Stormy Trilby

Trilby Mini:

https://backpack.tf/suggestion/5d89c860d381720f5b486114

Suggestion for 12 keys

Total is 8 keys

5.5, 7, 8, 18 keys

18 is obviously high,

buyers up to 6 keys,

taking 7 - 8 keys