Sale 1:

https://backpack.tf/profiles/76561198002757046#!/compare/1547683200/1547769600

https://backpack.tf/profiles/76561198197935990#!/compare/1547683200/1547769600

Sold for PE Defiant + 5 keys

Use there

Sale 2:

https://backpack.tf/profiles/76561198197935990#!/compare/1547942400/1548460800

https://backpack.tf/profiles/76561198400514038#!/compare/1548374400/1548460800

Sold with ~7 keys in sweets for Scorching Metal Drill

Drill Mini:

https://backpack.tf/suggestion/5c99caa76780727fae226e68

Suggestion for 67 keys

Total is 60 keys

https://bot.tf/stats/listings/MQ50G90Y

B/O of 52 keys, capping

Sale 3:

https://backpack.tf/profiles/76561198400514038#!/compare/1548374400/1548460800

https://backpack.tf/profiles/76561198313538268#!/compare/1548374400/1548460800

QS?

Sale 4:

https://backpack.tf/profiles/76561198312555310#!/compare/1549843200/1549929600

https://backpack.tf/profiles/76561198297554259#!/compare/1549843200/1549929600

Sold for Beams Tyrannus + ~5 keys in sweets

Use there

Sale 5:

https://backpack.tf/profiles/76561198297554259#!/compare/1550275200/1550448000

https://backpack.tf/profiles/76561198232041512#!/compare/1550361600/1550448000

Bulk

Sale 6:

https://backpack.tf/profiles/76561198232041512#!/compare/1553040000/1553299200

https://backpack.tf/profiles/76561198447257724#!/compare/1553212800/1553299200

QS?

Sale 7:

https://marketplace.tf/items/177;5;u14

$75.00 / $1.79 = 41.90 keys

Total sales @:

41.90, 52 keys

builders up to 46 keys,

sellers down to 53 keys,

taking 52 flat.